[{"abstract":[{"text":"Recently it was shown that anyons on the two-sphere naturally arise from a system of molecular impurities exchanging angular momentum with a many-particle bath (Phys. Rev. Lett. 126, 015301 (2021)). Here we further advance this approach and rigorously demonstrate that in the experimentally realized regime the lowest spectrum of two linear molecules immersed in superfluid helium corresponds to the spectrum of two anyons on the sphere. We develop the formalism within the framework of the recently experimentally observed angulon quasiparticle","lang":"eng"}],"file_date_updated":"2022-01-03T10:15:05Z","status":"public","day":"02","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"year":"2021","scopus_import":"1","user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","title":"Emergence of anyons on the two-sphere in molecular impurities","external_id":{"arxiv":["2108.06966"]},"arxiv":1,"quality_controlled":"1","acknowledgement":"D. Lundholm acknowledges financial support from the Göran Gustafsson Foundation (grant no. 1804).","volume":9,"date_updated":"2024-10-09T21:01:20Z","_id":"10585","article_number":"106","type":"journal_article","issue":"4","month":"12","publication_status":"published","article_type":"original","intvolume":"         9","has_accepted_license":"1","publication":"Atoms","doi":"10.3390/atoms9040106","article_processing_charge":"Yes","language":[{"iso":"eng"}],"author":[{"first_name":"Morris","id":"B7ECF9FC-AA38-11E9-AC9A-0930E6697425","orcid":"0000-0002-6249-0928","last_name":"Brooks","full_name":"Brooks, Morris"},{"full_name":"Lemeshko, Mikhail","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-6990-7802","last_name":"Lemeshko","first_name":"Mikhail"},{"full_name":"Lundholm, Douglas","last_name":"Lundholm","first_name":"Douglas"},{"id":"38CB71F6-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-5973-0874","last_name":"Yakaboylu","full_name":"Yakaboylu, Enderalp","first_name":"Enderalp"}],"date_created":"2022-01-02T23:01:33Z","keyword":["anyons","quasiparticles","Quantum Hall Effect","topological states of matter"],"publication_identifier":{"eissn":["2218-2004"]},"file":[{"access_level":"open_access","file_size":303070,"date_updated":"2022-01-03T10:15:05Z","file_name":"2021_Atoms_Brooks.pdf","relation":"main_file","content_type":"application/pdf","file_id":"10592","checksum":"d0e44b95f36c9e06724f66832af0f8c3","creator":"alisjak","date_created":"2022-01-03T10:15:05Z","success":1}],"oa_version":"Published Version","department":[{"_id":"MiLe"},{"_id":"RoSe"}],"oa":1,"corr_author":"1","citation":{"apa":"Brooks, M., Lemeshko, M., Lundholm, D., &#38; Yakaboylu, E. (2021). Emergence of anyons on the two-sphere in molecular impurities. <i>Atoms</i>. MDPI. <a href=\"https://doi.org/10.3390/atoms9040106\">https://doi.org/10.3390/atoms9040106</a>","mla":"Brooks, Morris, et al. “Emergence of Anyons on the Two-Sphere in Molecular Impurities.” <i>Atoms</i>, vol. 9, no. 4, 106, MDPI, 2021, doi:<a href=\"https://doi.org/10.3390/atoms9040106\">10.3390/atoms9040106</a>.","ieee":"M. Brooks, M. Lemeshko, D. Lundholm, and E. Yakaboylu, “Emergence of anyons on the two-sphere in molecular impurities,” <i>Atoms</i>, vol. 9, no. 4. MDPI, 2021.","short":"M. Brooks, M. Lemeshko, D. Lundholm, E. Yakaboylu, Atoms 9 (2021).","chicago":"Brooks, Morris, Mikhail Lemeshko, Douglas Lundholm, and Enderalp Yakaboylu. “Emergence of Anyons on the Two-Sphere in Molecular Impurities.” <i>Atoms</i>. MDPI, 2021. <a href=\"https://doi.org/10.3390/atoms9040106\">https://doi.org/10.3390/atoms9040106</a>.","ista":"Brooks M, Lemeshko M, Lundholm D, Yakaboylu E. 2021. Emergence of anyons on the two-sphere in molecular impurities. Atoms. 9(4), 106.","ama":"Brooks M, Lemeshko M, Lundholm D, Yakaboylu E. Emergence of anyons on the two-sphere in molecular impurities. <i>Atoms</i>. 2021;9(4). doi:<a href=\"https://doi.org/10.3390/atoms9040106\">10.3390/atoms9040106</a>"},"publisher":"MDPI","ddc":["530"],"date_published":"2021-12-02T00:00:00Z"},{"year":"2021","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"03","status":"public","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","external_id":{"isi":["000736602200001"]},"title":"Fe2O3 nanoparticles deposited over self-floating facial sponge for facile interfacial seawater solar desalination","scopus_import":"1","file_date_updated":"2022-01-03T09:46:53Z","abstract":[{"text":"A facile approach for developing an interfacial solar evaporator by heat localization of solar-thermal energy conversion at water-air liquid composed by in-situ polymerization of Fe2O3 nanoparticles (Fe2O3@PPy) deposited over a facial sponge is proposed. The demonstrated system consists of a floating solar receiver having a vertically cross-linked microchannel for wicking up saline water. The in situ polymerized Fe2O3@PPy interfacial layer promotes diffuse reflection and its rough black surface allows Omni-directional solar absorption (94%) and facilitates efficient thermal localization at the water/air interface and offers a defect-rich surface to promote heat localization (41.9 °C) and excellent thermal management due to cellulosic content. The self-floating composite foam reveals continuous vapors generation at a rate of 1.52 kg m−2 h−1 under one 1 kW m−2 and profound evaporating efficiency (95%) without heat losses that dissipates in its surroundings. Indeed, long-term evaporation experiments reveal the negligible disparity in continuous evaporation rate (33.84 kg m−2/8.3 h) receiving two sun solar intensity, and ensures the stability of the device under intense seawater conditions synchronized with excellent salt rejection potential. More importantly, Raman spectroscopy investigation validates the orange dye rejection via Fe2O3@PPy solar evaporator. The combined advantages of high efficiency, self-floating capability, multimedia rejection, low cost, and this configuration are promising for producing large-scale solar steam generating systems appropriate for commercial clean water yield due to their scalable fabrication.","lang":"eng"}],"article_number":"1509","_id":"10586","month":"12","alternative_title":["Hybrid and Composite Crystalline Materials"],"issue":"12","type":"journal_article","quality_controlled":"1","date_updated":"2023-08-17T06:31:20Z","volume":11,"acknowledgement":"The authors extend their appreciation to King Saud University for funding this work through Researchers Supporting Project number (RSP-2021/387), King Saud University, Riyadh, Saudi Arabia.","language":[{"iso":"eng"}],"author":[{"first_name":"Yuzheng","last_name":"Lu","full_name":"Lu, Yuzheng"},{"first_name":"Naila","full_name":"Arshad, Naila","last_name":"Arshad"},{"first_name":"Muhammad Sultan","full_name":"Irshad, Muhammad Sultan","last_name":"Irshad"},{"first_name":"Iftikhar","full_name":"Ahmed, Iftikhar","last_name":"Ahmed"},{"first_name":"Shafiq","last_name":"Ahmad","full_name":"Ahmad, Shafiq"},{"full_name":"Alshahrani, Lina Abdullah","last_name":"Alshahrani","first_name":"Lina Abdullah"},{"full_name":"Yousaf, Muhammad","last_name":"Yousaf","first_name":"Muhammad"},{"full_name":"Sayed, Abdelaty Edrees","last_name":"Sayed","first_name":"Abdelaty Edrees"},{"full_name":"Nauman, Muhammad","last_name":"Nauman","id":"32c21954-2022-11eb-9d5f-af9f93c24e71","orcid":"0000-0002-2111-4846","first_name":"Muhammad"}],"date_created":"2022-01-02T23:01:34Z","intvolume":"        11","isi":1,"article_type":"original","publication_status":"published","doi":"10.3390/cryst11121509","article_processing_charge":"No","publication":"Crystals","has_accepted_license":"1","publisher":"MDPI","citation":{"ama":"Lu Y, Arshad N, Irshad MS, et al. Fe2O3 nanoparticles deposited over self-floating facial sponge for facile interfacial seawater solar desalination. <i>Crystals</i>. 2021;11(12). doi:<a href=\"https://doi.org/10.3390/cryst11121509\">10.3390/cryst11121509</a>","short":"Y. Lu, N. Arshad, M.S. Irshad, I. Ahmed, S. Ahmad, L.A. Alshahrani, M. Yousaf, A.E. Sayed, M. Nauman, Crystals 11 (2021).","chicago":"Lu, Yuzheng, Naila Arshad, Muhammad Sultan Irshad, Iftikhar Ahmed, Shafiq Ahmad, Lina Abdullah Alshahrani, Muhammad Yousaf, Abdelaty Edrees Sayed, and Muhammad Nauman. “Fe2O3 Nanoparticles Deposited over Self-Floating Facial Sponge for Facile Interfacial Seawater Solar Desalination.” <i>Crystals</i>. MDPI, 2021. <a href=\"https://doi.org/10.3390/cryst11121509\">https://doi.org/10.3390/cryst11121509</a>.","ista":"Lu Y, Arshad N, Irshad MS, Ahmed I, Ahmad S, Alshahrani LA, Yousaf M, Sayed AE, Nauman M. 2021. Fe2O3 nanoparticles deposited over self-floating facial sponge for facile interfacial seawater solar desalination. Crystals. 11(12), 1509.","ieee":"Y. Lu <i>et al.</i>, “Fe2O3 nanoparticles deposited over self-floating facial sponge for facile interfacial seawater solar desalination,” <i>Crystals</i>, vol. 11, no. 12. MDPI, 2021.","apa":"Lu, Y., Arshad, N., Irshad, M. S., Ahmed, I., Ahmad, S., Alshahrani, L. A., … Nauman, M. (2021). Fe2O3 nanoparticles deposited over self-floating facial sponge for facile interfacial seawater solar desalination. <i>Crystals</i>. MDPI. <a href=\"https://doi.org/10.3390/cryst11121509\">https://doi.org/10.3390/cryst11121509</a>","mla":"Lu, Yuzheng, et al. “Fe2O3 Nanoparticles Deposited over Self-Floating Facial Sponge for Facile Interfacial Seawater Solar Desalination.” <i>Crystals</i>, vol. 11, no. 12, 1509, MDPI, 2021, doi:<a href=\"https://doi.org/10.3390/cryst11121509\">10.3390/cryst11121509</a>."},"ddc":["620"],"date_published":"2021-12-03T00:00:00Z","file":[{"file_name":"2021_Crystals_Yuzheng.pdf","date_created":"2022-01-03T09:46:53Z","success":1,"checksum":"668e9d777608ce0a3bc2e305133bd06b","creator":"alisjak","file_id":"10591","content_type":"application/pdf","relation":"main_file","date_updated":"2022-01-03T09:46:53Z","file_size":4569639,"access_level":"open_access"}],"oa_version":"Published Version","department":[{"_id":"KiMo"}],"publication_identifier":{"eissn":["2073-4352"]},"oa":1},{"_id":"10593","month":"12","type":"conference","quality_controlled":"1","volume":35,"date_updated":"2025-04-15T07:50:11Z","acknowledgement":"M. Mondelli would like to thank László Erdős for helpful discussions. M. Mondelli was partially supported by the 2019 Lopez-Loreta Prize. R. Venkataramanan was partially supported by the Alan Turing Institute under the EPSRC grant EP/N510129/1.\r\n","day":"01","year":"2021","status":"public","title":"PCA initialization for approximate message passing in rotationally invariant models","arxiv":1,"external_id":{"arxiv":["2106.02356"]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","scopus_import":"1","page":"29616-29629","project":[{"_id":"059876FA-7A3F-11EA-A408-12923DDC885E","name":"Prix Lopez-Loretta 2019 - Marco Mondelli"}],"abstract":[{"text":"We study the problem of estimating a rank-$1$ signal in the presence of rotationally invariant noise-a class of perturbations more general than Gaussian noise. Principal Component Analysis (PCA) provides a natural estimator, and sharp results on its performance have been obtained in the high-dimensional regime. Recently, an Approximate Message Passing (AMP) algorithm has been proposed as an alternative estimator with the potential to improve the accuracy of PCA. However, the existing analysis of AMP requires an initialization that is both correlated with the signal and independent of the noise, which is often unrealistic in practice. In this work, we combine the two methods, and propose to initialize AMP with PCA. Our main result is a rigorous asymptotic characterization of the performance of this estimator. Both the AMP algorithm and its analysis differ from those previously derived in the Gaussian setting: at every iteration, our AMP algorithm requires a specific term to account for PCA initialization, while in the Gaussian case, PCA initialization affects only the first iteration of AMP. The proof is based on a two-phase artificial AMP that first approximates the PCA estimator and then mimics the true AMP. Our numerical simulations show an excellent agreement between AMP results and theoretical predictions, and suggest an interesting open direction on achieving Bayes-optimal performance.","lang":"eng"}],"citation":{"ama":"Mondelli M, Venkataramanan R. PCA initialization for approximate message passing in rotationally invariant models. In: <i>35th Conference on Neural Information Processing Systems</i>. Vol 35. Neural Information Processing Systems Foundation; 2021:29616-29629.","ista":"Mondelli M, Venkataramanan R. 2021. PCA initialization for approximate message passing in rotationally invariant models. 35th Conference on Neural Information Processing Systems. NeurIPS: Neural Information Processing Systems vol. 35, 29616–29629.","short":"M. Mondelli, R. Venkataramanan, in:, 35th Conference on Neural Information Processing Systems, Neural Information Processing Systems Foundation, 2021, pp. 29616–29629.","chicago":"Mondelli, Marco, and Ramji Venkataramanan. “PCA Initialization for Approximate Message Passing in Rotationally Invariant Models.” In <i>35th Conference on Neural Information Processing Systems</i>, 35:29616–29. Neural Information Processing Systems Foundation, 2021.","ieee":"M. Mondelli and R. Venkataramanan, “PCA initialization for approximate message passing in rotationally invariant models,” in <i>35th Conference on Neural Information Processing Systems</i>, Virtual, 2021, vol. 35, pp. 29616–29629.","mla":"Mondelli, Marco, and Ramji Venkataramanan. “PCA Initialization for Approximate Message Passing in Rotationally Invariant Models.” <i>35th Conference on Neural Information Processing Systems</i>, vol. 35, Neural Information Processing Systems Foundation, 2021, pp. 29616–29.","apa":"Mondelli, M., &#38; Venkataramanan, R. (2021). PCA initialization for approximate message passing in rotationally invariant models. In <i>35th Conference on Neural Information Processing Systems</i> (Vol. 35, pp. 29616–29629). Virtual: Neural Information Processing Systems Foundation."},"publisher":"Neural Information Processing Systems Foundation","corr_author":"1","main_file_link":[{"url":"https://arxiv.org/abs/2106.02356","open_access":"1"}],"date_published":"2021-12-01T00:00:00Z","conference":{"location":"Virtual","end_date":"2021-12-14","start_date":"2021-12-06","name":"NeurIPS: Neural Information Processing Systems"},"department":[{"_id":"MaMo"}],"oa_version":"Preprint","publication_identifier":{"isbn":["9781713845393"],"issn":["1049-5258"]},"oa":1,"author":[{"full_name":"Mondelli, Marco","last_name":"Mondelli","id":"27EB676C-8706-11E9-9510-7717E6697425","orcid":"0000-0002-3242-7020","first_name":"Marco"},{"last_name":"Venkataramanan","full_name":"Venkataramanan, Ramji","first_name":"Ramji"}],"language":[{"iso":"eng"}],"date_created":"2022-01-03T10:50:02Z","intvolume":"        35","publication_status":"published","publication":"35th Conference on Neural Information Processing Systems","article_processing_charge":"No"},{"publisher":"Neural Information Processing Systems Foundation","citation":{"short":"Q. Nguyen, P. Bréchet, M. Mondelli, in:, 35th Conference on Neural Information Processing Systems, Neural Information Processing Systems Foundation, 2021.","chicago":"Nguyen, Quynh, Pierre Bréchet, and Marco Mondelli. “When Are Solutions Connected in Deep Networks?” In <i>35th Conference on Neural Information Processing Systems</i>, Vol. 35. Neural Information Processing Systems Foundation, 2021.","ista":"Nguyen Q, Bréchet P, Mondelli M. 2021. When are solutions connected in deep networks? 35th Conference on Neural Information Processing Systems. 35th Conference on Neural Information Processing Systems vol. 35.","ama":"Nguyen Q, Bréchet P, Mondelli M. When are solutions connected in deep networks? In: <i>35th Conference on Neural Information Processing Systems</i>. Vol 35. Neural Information Processing Systems Foundation; 2021.","mla":"Nguyen, Quynh, et al. “When Are Solutions Connected in Deep Networks?” <i>35th Conference on Neural Information Processing Systems</i>, vol. 35, Neural Information Processing Systems Foundation, 2021.","apa":"Nguyen, Q., Bréchet, P., &#38; Mondelli, M. (2021). When are solutions connected in deep networks? In <i>35th Conference on Neural Information Processing Systems</i> (Vol. 35). Virtual: Neural Information Processing Systems Foundation.","ieee":"Q. Nguyen, P. Bréchet, and M. Mondelli, “When are solutions connected in deep networks?,” in <i>35th Conference on Neural Information Processing Systems</i>, Virtual, 2021, vol. 35."},"corr_author":"1","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2102.09671"}],"date_published":"2021-12-01T00:00:00Z","department":[{"_id":"MaMo"}],"oa_version":"Preprint","conference":{"name":"35th Conference on Neural Information Processing Systems","end_date":"2021-12-14","start_date":"2021-12-06","location":"Virtual"},"publication_identifier":{"issn":["1049-5258"],"isbn":["9781713845393"]},"oa":1,"author":[{"last_name":"Nguyen","full_name":"Nguyen, Quynh","first_name":"Quynh"},{"full_name":"Bréchet, Pierre","last_name":"Bréchet","first_name":"Pierre"},{"first_name":"Marco","full_name":"Mondelli, Marco","orcid":"0000-0002-3242-7020","last_name":"Mondelli","id":"27EB676C-8706-11E9-9510-7717E6697425"}],"language":[{"iso":"eng"}],"date_created":"2022-01-03T10:56:20Z","intvolume":"        35","publication_status":"published","article_processing_charge":"No","publication":"35th Conference on Neural Information Processing Systems","_id":"10594","month":"12","type":"conference","quality_controlled":"1","volume":35,"date_updated":"2025-04-15T07:50:11Z","acknowledgement":"MM was partially supported by the 2019 Lopez-Loreta Prize. QN and PB acknowledge support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no 757983).","year":"2021","day":"01","status":"public","arxiv":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","title":"When are solutions connected in deep networks?","external_id":{"arxiv":["2102.09671"]},"abstract":[{"text":"The question of how and why the phenomenon of mode connectivity occurs in training deep neural networks has gained remarkable attention in the research community. From a theoretical perspective, two possible explanations have been proposed: (i) the loss function has connected sublevel sets, and (ii) the solutions found by stochastic gradient descent are dropout stable. While these explanations provide insights into the phenomenon, their assumptions are not always satisfied in practice. In particular, the first approach requires the network to have one layer with order of N neurons (N being the number of training samples), while the second one requires the loss to be almost invariant after removing half of the neurons at each layer (up to some rescaling of the remaining ones). In this work, we improve both conditions by exploiting the quality of the features at every intermediate layer together with a milder over-parameterization condition. More specifically, we show that: (i) under generic assumptions on the features of intermediate layers, it suffices that the last two hidden layers have order of N−−√ neurons, and (ii) if subsets of features at each layer are linearly separable, then no over-parameterization is needed to show the connectivity. Our experiments confirm that the proposed condition ensures the connectivity of solutions found by stochastic gradient descent, even in settings where the previous requirements do not hold.","lang":"eng"}],"project":[{"name":"Prix Lopez-Loretta 2019 - Marco Mondelli","_id":"059876FA-7A3F-11EA-A408-12923DDC885E"}]},{"oa":1,"conference":{"location":"Virtual","name":"ICML: International Conference on Machine Learning","end_date":"2021-07-24","start_date":"2021-07-18"},"department":[{"_id":"MaMo"}],"oa_version":"Published Version","main_file_link":[{"open_access":"1","url":"http://proceedings.mlr.press/v139/nguyen21g.html"}],"date_published":"2021-01-01T00:00:00Z","ddc":["000"],"citation":{"mla":"Nguyen, Quynh, et al. “Tight Bounds on the Smallest Eigenvalue of the Neural Tangent Kernel for Deep ReLU Networks.” <i>Proceedings of the 38th International Conference on Machine Learning</i>, edited by Marina Meila and Tong Zhang, vol. 139, ML Research Press, 2021, pp. 8119–29.","apa":"Nguyen, Q., Mondelli, M., &#38; Montufar, G. F. (2021). Tight bounds on the smallest eigenvalue of the neural tangent kernel for deep ReLU networks. In M. Meila &#38; T. Zhang (Eds.), <i>Proceedings of the 38th International Conference on Machine Learning</i> (Vol. 139, pp. 8119–8129). Virtual: ML Research Press.","ieee":"Q. Nguyen, M. Mondelli, and G. F. Montufar, “Tight bounds on the smallest eigenvalue of the neural tangent kernel for deep ReLU networks,” in <i>Proceedings of the 38th International Conference on Machine Learning</i>, Virtual, 2021, vol. 139, pp. 8119–8129.","chicago":"Nguyen, Quynh, Marco Mondelli, and Guido F Montufar. “Tight Bounds on the Smallest Eigenvalue of the Neural Tangent Kernel for Deep ReLU Networks.” In <i>Proceedings of the 38th International Conference on Machine Learning</i>, edited by Marina Meila and Tong Zhang, 139:8119–29. ML Research Press, 2021.","ista":"Nguyen Q, Mondelli M, Montufar GF. 2021. Tight bounds on the smallest eigenvalue of the neural tangent kernel for deep ReLU networks. Proceedings of the 38th International Conference on Machine Learning. ICML: International Conference on Machine Learning, Proceedings of Machine Learning Research, vol. 139, 8119–8129.","short":"Q. Nguyen, M. Mondelli, G.F. Montufar, in:, M. Meila, T. Zhang (Eds.), Proceedings of the 38th International Conference on Machine Learning, ML Research Press, 2021, pp. 8119–8129.","ama":"Nguyen Q, Mondelli M, Montufar GF. Tight bounds on the smallest eigenvalue of the neural tangent kernel for deep ReLU networks. In: Meila M, Zhang T, eds. <i>Proceedings of the 38th International Conference on Machine Learning</i>. Vol 139. ML Research Press; 2021:8119-8129."},"publisher":"ML Research Press","publication":"Proceedings of the 38th International Conference on Machine Learning","article_processing_charge":"No","publication_status":"published","intvolume":"       139","date_created":"2022-01-03T10:57:49Z","language":[{"iso":"eng"}],"author":[{"last_name":"Nguyen","full_name":"Nguyen, Quynh","first_name":"Quynh"},{"orcid":"0000-0002-3242-7020","last_name":"Mondelli","id":"27EB676C-8706-11E9-9510-7717E6697425","full_name":"Mondelli, Marco","first_name":"Marco"},{"full_name":"Montufar, Guido F","last_name":"Montufar","first_name":"Guido F"}],"acknowledgement":"The authors would like to thank the anonymous reviewers for their helpful comments. MM was partially supported\r\nby the 2019 Lopez-Loreta Prize. QN and GM acknowledge support from the European Research Council (ERC) under\r\nthe European Union’s Horizon 2020 research and innovation programme (grant agreement no 757983).","date_updated":"2026-06-18T08:43:54Z","volume":139,"quality_controlled":"1","type":"conference","alternative_title":["Proceedings of Machine Learning Research"],"editor":[{"first_name":"Marina","full_name":"Meila, Marina","last_name":"Meila"},{"first_name":"Tong","full_name":"Zhang, Tong","last_name":"Zhang"}],"month":"01","_id":"10595","project":[{"_id":"059876FA-7A3F-11EA-A408-12923DDC885E","name":"Prix Lopez-Loretta 2019 - Marco Mondelli"}],"abstract":[{"lang":"eng","text":"A recent line of work has analyzed the theoretical properties of deep neural networks via the Neural Tangent Kernel (NTK). In particular, the smallest eigenvalue of the NTK has been related to the memorization capacity, the global convergence of gradient descent algorithms and the generalization of deep nets. However, existing results either provide bounds in the two-layer setting or assume that the spectrum of the NTK matrices is bounded away from 0 for multi-layer networks. In this paper, we provide tight bounds on the smallest eigenvalue of NTK matrices for deep ReLU nets, both in the limiting case of infinite widths and for finite widths. In the finite-width setting, the network architectures we consider are fairly general: we require the existence of a wide layer with roughly order of $N$ neurons, $N$ being the number of data samples; and the scaling of the remaining layer widths is arbitrary (up to logarithmic factors). To obtain our results, we analyze various quantities of independent interest: we give lower bounds on the smallest singular value of hidden feature matrices, and upper bounds on the Lipschitz constant of input-output feature maps."}],"page":"8119-8129","external_id":{"arxiv":["2012.11654"]},"arxiv":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","title":"Tight bounds on the smallest eigenvalue of the neural tangent kernel for deep ReLU networks","status":"public","day":"01","year":"2021"},{"_id":"10598","type":"conference","alternative_title":["Proceedings of Machine Learning Research"],"editor":[{"first_name":"Arindam","full_name":"Banerjee, Arindam","last_name":"Banerjee"},{"first_name":"Kenji","full_name":"Fukumizu, Kenji","last_name":"Fukumizu"}],"month":"04","quality_controlled":"1","acknowledgement":"The authors would like to thank Andrea Montanari for helpful discussions. M. Mondelli was partially supported by the 2019 Lopez-Loreta Prize. R. Venkataramanan was partially supported by the Alan Turing Institute under the EPSRC grant EP/N510129/1.","date_updated":"2025-04-15T07:50:16Z","volume":130,"status":"public","day":"01","year":"2021","scopus_import":"1","user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","external_id":{"arxiv":["2010.03460"]},"arxiv":1,"title":"Approximate message passing with spectral initialization for generalized linear models","project":[{"name":"Prix Lopez-Loretta 2019 - Marco Mondelli","_id":"059876FA-7A3F-11EA-A408-12923DDC885E"}],"abstract":[{"lang":"eng","text":" We consider the problem of estimating a signal from measurements obtained via a generalized linear model. We focus on estimators based on approximate message passing (AMP), a family of iterative algorithms with many appealing features: the performance of AMP in the high-dimensional limit can be succinctly characterized under suitable model assumptions; AMP can also be tailored to the empirical distribution of the signal entries, and for a wide class of estimation problems, AMP is conjectured to be optimal among all polynomial-time algorithms. However, a major issue of AMP is that in many models (such as phase retrieval), it requires an initialization correlated with the ground-truth signal and independent from the measurement matrix. Assuming that such an initialization is available is typically not realistic. In this paper, we solve this problem by proposing an AMP algorithm initialized with a spectral estimator. With such an initialization, the standard AMP analysis fails since the spectral estimator depends in a complicated way on the design matrix. Our main contribution is a rigorous characterization of the performance of AMP with spectral initialization in the high-dimensional limit. The key technical idea is to define and analyze a two-phase artificial AMP algorithm that first produces the spectral estimator, and then closely approximates the iterates of the true AMP. We also provide numerical results that demonstrate the validity of the proposed approach. "}],"page":"397-405","citation":{"mla":"Mondelli, Marco, and Ramji Venkataramanan. “Approximate Message Passing with Spectral Initialization for Generalized Linear Models.” <i>Proceedings of The 24th International Conference on Artificial Intelligence and Statistics</i>, edited by Arindam Banerjee and Kenji Fukumizu, vol. 130, ML Research Press, 2021, pp. 397–405.","apa":"Mondelli, M., &#38; Venkataramanan, R. (2021). Approximate message passing with spectral initialization for generalized linear models. In A. Banerjee &#38; K. Fukumizu (Eds.), <i>Proceedings of The 24th International Conference on Artificial Intelligence and Statistics</i> (Vol. 130, pp. 397–405). Virtual, San Diego, CA, United States: ML Research Press.","ieee":"M. Mondelli and R. Venkataramanan, “Approximate message passing with spectral initialization for generalized linear models,” in <i>Proceedings of The 24th International Conference on Artificial Intelligence and Statistics</i>, Virtual, San Diego, CA, United States, 2021, vol. 130, pp. 397–405.","chicago":"Mondelli, Marco, and Ramji Venkataramanan. “Approximate Message Passing with Spectral Initialization for Generalized Linear Models.” In <i>Proceedings of The 24th International Conference on Artificial Intelligence and Statistics</i>, edited by Arindam Banerjee and Kenji Fukumizu, 130:397–405. ML Research Press, 2021.","short":"M. Mondelli, R. Venkataramanan, in:, A. Banerjee, K. Fukumizu (Eds.), Proceedings of The 24th International Conference on Artificial Intelligence and Statistics, ML Research Press, 2021, pp. 397–405.","ista":"Mondelli M, Venkataramanan R. 2021. Approximate message passing with spectral initialization for generalized linear models. Proceedings of The 24th International Conference on Artificial Intelligence and Statistics. AISTATS: Artificial Intelligence and Statistics, Proceedings of Machine Learning Research, vol. 130, 397–405.","ama":"Mondelli M, Venkataramanan R. Approximate message passing with spectral initialization for generalized linear models. In: Banerjee A, Fukumizu K, eds. <i>Proceedings of The 24th International Conference on Artificial Intelligence and Statistics</i>. Vol 130. ML Research Press; 2021:397-405."},"publisher":"ML Research Press","date_published":"2021-04-01T00:00:00Z","main_file_link":[{"url":"https://proceedings.mlr.press/v130/mondelli21a.html","open_access":"1"}],"publication_identifier":{"issn":["2640-3498"]},"conference":{"start_date":"2021-04-13","end_date":"2021-04-15","name":"AISTATS: Artificial Intelligence and Statistics","location":"Virtual, San Diego, CA, United States"},"oa_version":"Preprint","department":[{"_id":"MaMo"}],"oa":1,"language":[{"iso":"eng"}],"author":[{"full_name":"Mondelli, Marco","id":"27EB676C-8706-11E9-9510-7717E6697425","orcid":"0000-0002-3242-7020","last_name":"Mondelli","first_name":"Marco"},{"full_name":"Venkataramanan, Ramji","last_name":"Venkataramanan","first_name":"Ramji"}],"related_material":{"record":[{"status":"public","id":"12480","relation":"later_version"}]},"date_created":"2022-01-03T11:34:22Z","publication_status":"published","intvolume":"       130","publication":"Proceedings of The 24th International Conference on Artificial Intelligence and Statistics","article_processing_charge":"Yes (via OA deal)"},{"date_published":"2021-12-21T00:00:00Z","ddc":["570"],"publisher":"eLife Sciences Publications","citation":{"ama":"Godard BG, Dumollard R, Heisenberg C-PJ, Mcdougall A. Combined effect of cell geometry and polarity domains determines the orientation of unequal division. <i>eLife</i>. 2021;10. doi:<a href=\"https://doi.org/10.7554/eLife.75639\">10.7554/eLife.75639</a>","short":"B.G. Godard, R. Dumollard, C.-P.J. Heisenberg, A. Mcdougall, ELife 10 (2021).","ista":"Godard BG, Dumollard R, Heisenberg C-PJ, Mcdougall A. 2021. Combined effect of cell geometry and polarity domains determines the orientation of unequal division. eLife. 10, e75639.","chicago":"Godard, Benoit G, Remi Dumollard, Carl-Philipp J Heisenberg, and Alex Mcdougall. “Combined Effect of Cell Geometry and Polarity Domains Determines the Orientation of Unequal Division.” <i>ELife</i>. eLife Sciences Publications, 2021. <a href=\"https://doi.org/10.7554/eLife.75639\">https://doi.org/10.7554/eLife.75639</a>.","ieee":"B. G. Godard, R. Dumollard, C.-P. J. Heisenberg, and A. Mcdougall, “Combined effect of cell geometry and polarity domains determines the orientation of unequal division,” <i>eLife</i>, vol. 10. eLife Sciences Publications, 2021.","apa":"Godard, B. G., Dumollard, R., Heisenberg, C.-P. J., &#38; Mcdougall, A. (2021). Combined effect of cell geometry and polarity domains determines the orientation of unequal division. <i>ELife</i>. eLife Sciences Publications. <a href=\"https://doi.org/10.7554/eLife.75639\">https://doi.org/10.7554/eLife.75639</a>","mla":"Godard, Benoit G., et al. “Combined Effect of Cell Geometry and Polarity Domains Determines the Orientation of Unequal Division.” <i>ELife</i>, vol. 10, e75639, eLife Sciences Publications, 2021, doi:<a href=\"https://doi.org/10.7554/eLife.75639\">10.7554/eLife.75639</a>."},"corr_author":"1","oa":1,"department":[{"_id":"CaHe"}],"file":[{"file_id":"10611","checksum":"759c7a873d554c48a6639e6350746ca6","success":1,"creator":"alisjak","date_created":"2022-01-10T09:40:37Z","relation":"main_file","content_type":"application/pdf","file_name":"2021_eLife_Godard.pdf","file_size":7769934,"date_updated":"2022-01-10T09:40:37Z","access_level":"open_access"}],"oa_version":"Published Version","publication_identifier":{"eissn":["2050-084X"]},"date_created":"2022-01-09T23:01:26Z","pmid":1,"author":[{"full_name":"Godard, Benoit G","last_name":"Godard","id":"33280250-F248-11E8-B48F-1D18A9856A87","first_name":"Benoit G"},{"first_name":"Remi","last_name":"Dumollard","full_name":"Dumollard, Remi"},{"first_name":"Carl-Philipp J","full_name":"Heisenberg, Carl-Philipp J","last_name":"Heisenberg","orcid":"0000-0002-0912-4566","id":"39427864-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Alex","full_name":"Mcdougall, Alex","last_name":"Mcdougall"}],"language":[{"iso":"eng"}],"doi":"10.7554/eLife.75639","acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"Bio"}],"article_processing_charge":"No","has_accepted_license":"1","publication":"eLife","isi":1,"intvolume":"        10","article_type":"original","publication_status":"published","month":"12","type":"journal_article","article_number":"e75639","_id":"10606","volume":10,"date_updated":"2025-04-14T12:59:47Z","acknowledgement":"We thank members of the Heisenberg and McDougall groups for technical advice and discussion. We are grateful to the Bioimaging and Nanofabrication facilities of IST Austria and the Imaging Platform (PIM) and animal facility (CRB) of Institut de la Mer de Villefranche (IMEV), which is supported by EMBRC-France, whose French state funds are managed by the ANR within the Investments of the Future program under reference ANR-10-INBS-0, for continuous support. This work was supported by a collaborative grant from the French Government funding agency Agence National de la Recherche to McDougall (ANR 'MorCell': ANR-17-CE 13-0028) and the Austrian Science Fund to Heisenberg (FWF: I 3601-B27).","quality_controlled":"1","title":"Combined effect of cell geometry and polarity domains determines the orientation of unequal division","external_id":{"pmid":["34889186"],"isi":["000733610100001"]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","scopus_import":"1","year":"2021","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"21","status":"public","file_date_updated":"2022-01-10T09:40:37Z","abstract":[{"lang":"eng","text":"Cell division orientation is thought to result from a competition between cell geometry and polarity domains controlling the position of the mitotic spindle during mitosis. Depending on the level of cell shape anisotropy or the strength of the polarity domain, one dominates the other and determines the orientation of the spindle. Whether and how such competition is also at work to determine unequal cell division (UCD), producing daughter cells of different size, remains unclear. Here, we show that cell geometry and polarity domains cooperate, rather than compete, in positioning the cleavage plane during UCDs in early ascidian embryos. We found that the UCDs and their orientation at the ascidian third cleavage rely on the spindle tilting in an anisotropic cell shape, and cortical polarity domains exerting different effects on spindle astral microtubules. By systematically varying mitotic cell shape, we could modulate the effect of attractive and repulsive polarity domains and consequently generate predicted daughter cell size asymmetries and position. We therefore propose that the spindle position during UCD is set by the combined activities of cell geometry and polarity domains, where cell geometry modulates the effect of cortical polarity domain(s)."}],"project":[{"_id":"2646861A-B435-11E9-9278-68D0E5697425","name":"Control of embryonic cleavage pattern","grant_number":"I03601","call_identifier":"FWF"}]},{"publication_identifier":{"isbn":["978-3-030-92074-6"],"issn":["0302-9743"],"eisbn":["978-3-030-92075-3"],"eissn":["1611-3349"]},"oa_version":"Preprint","department":[{"_id":"KrPi"}],"conference":{"name":"ASIACRYPT: International Conference on Cryptology in Asia","start_date":"2021-12-06","end_date":"2021-12-10","location":"Virtual, Singapore"},"oa":1,"publisher":"Springer Nature","citation":{"ama":"Chakraborty S, Ganesh C, Pancholi M, Sarkar P. Reverse firewalls for adaptively secure MPC without setup. In: <i>27th International Conference on the Theory and Application of Cryptology and Information Security</i>. Vol 13091. Springer Nature; 2021:335-364. doi:<a href=\"https://doi.org/10.1007/978-3-030-92075-3_12\">10.1007/978-3-030-92075-3_12</a>","ista":"Chakraborty S, Ganesh C, Pancholi M, Sarkar P. 2021. Reverse firewalls for adaptively secure MPC without setup. 27th International Conference on the Theory and Application of Cryptology and Information Security. ASIACRYPT: International Conference on Cryptology in Asia, LNCS, vol. 13091, 335–364.","short":"S. Chakraborty, C. Ganesh, M. Pancholi, P. Sarkar, in:, 27th International Conference on the Theory and Application of Cryptology and Information Security, Springer Nature, 2021, pp. 335–364.","chicago":"Chakraborty, Suvradip, Chaya Ganesh, Mahak Pancholi, and Pratik Sarkar. “Reverse Firewalls for Adaptively Secure MPC without Setup.” In <i>27th International Conference on the Theory and Application of Cryptology and Information Security</i>, 13091:335–64. Springer Nature, 2021. <a href=\"https://doi.org/10.1007/978-3-030-92075-3_12\">https://doi.org/10.1007/978-3-030-92075-3_12</a>.","ieee":"S. Chakraborty, C. Ganesh, M. Pancholi, and P. Sarkar, “Reverse firewalls for adaptively secure MPC without setup,” in <i>27th International Conference on the Theory and Application of Cryptology and Information Security</i>, Virtual, Singapore, 2021, vol. 13091, pp. 335–364.","apa":"Chakraborty, S., Ganesh, C., Pancholi, M., &#38; Sarkar, P. (2021). Reverse firewalls for adaptively secure MPC without setup. In <i>27th International Conference on the Theory and Application of Cryptology and Information Security</i> (Vol. 13091, pp. 335–364). Virtual, Singapore: Springer Nature. <a href=\"https://doi.org/10.1007/978-3-030-92075-3_12\">https://doi.org/10.1007/978-3-030-92075-3_12</a>","mla":"Chakraborty, Suvradip, et al. “Reverse Firewalls for Adaptively Secure MPC without Setup.” <i>27th International Conference on the Theory and Application of Cryptology and Information Security</i>, vol. 13091, Springer Nature, 2021, pp. 335–64, doi:<a href=\"https://doi.org/10.1007/978-3-030-92075-3_12\">10.1007/978-3-030-92075-3_12</a>."},"main_file_link":[{"url":"https://eprint.iacr.org/2021/1262","open_access":"1"}],"date_published":"2021-12-01T00:00:00Z","publication_status":"published","isi":1,"intvolume":"     13091","article_processing_charge":"No","doi":"10.1007/978-3-030-92075-3_12","publication":"27th International Conference on the Theory and Application of Cryptology and Information Security","ec_funded":1,"language":[{"iso":"eng"}],"author":[{"first_name":"Suvradip","full_name":"Chakraborty, Suvradip","id":"B9CD0494-D033-11E9-B219-A439E6697425","last_name":"Chakraborty"},{"full_name":"Ganesh, Chaya","last_name":"Ganesh","first_name":"Chaya"},{"last_name":"Pancholi","full_name":"Pancholi, Mahak","first_name":"Mahak"},{"first_name":"Pratik","full_name":"Sarkar, Pratik","last_name":"Sarkar"}],"date_created":"2022-01-09T23:01:27Z","quality_controlled":"1","date_updated":"2025-04-14T07:22:06Z","volume":13091,"_id":"10609","type":"conference","month":"12","alternative_title":["LNCS"],"abstract":[{"text":"We study Multi-party computation (MPC) in the setting of subversion, where the adversary tampers with the machines of honest parties. Our goal is to construct actively secure MPC protocols where parties are corrupted adaptively by an adversary (as in the standard adaptive security setting), and in addition, honest parties’ machines are compromised.\r\nThe idea of reverse firewalls (RF) was introduced at EUROCRYPT’15 by Mironov and Stephens-Davidowitz as an approach to protecting protocols against corruption of honest parties’ devices. Intuitively, an RF for a party   P  is an external entity that sits between   P  and the outside world and whose scope is to sanitize   P ’s incoming and outgoing messages in the face of subversion of their computer. Mironov and Stephens-Davidowitz constructed a protocol for passively-secure two-party computation. At CRYPTO’20, Chakraborty, Dziembowski and Nielsen constructed a protocol for secure computation with firewalls that improved on this result, both by extending it to multi-party computation protocol, and considering active security in the presence of static corruptions. In this paper, we initiate the study of RF for MPC in the adaptive setting. We put forward a definition for adaptively secure MPC in the reverse firewall setting, explore relationships among the security notions, and then construct reverse firewalls for MPC in this stronger setting of adaptive security. We also resolve the open question of Chakraborty, Dziembowski and Nielsen by removing the need for a trusted setup in constructing RF for MPC. Towards this end, we construct reverse firewalls for adaptively secure augmented coin tossing and adaptively secure zero-knowledge protocols and obtain a constant round adaptively secure MPC protocol in the reverse firewall setting without setup. Along the way, we propose a new multi-party adaptively secure coin tossing protocol in the plain model, that is of independent interest.","lang":"eng"}],"project":[{"call_identifier":"H2020","grant_number":"682815","name":"Teaching Old Crypto New Tricks","_id":"258AA5B2-B435-11E9-9278-68D0E5697425"}],"page":"335-364","status":"public","year":"2021","day":"01","scopus_import":"1","external_id":{"isi":["000927876200012"]},"title":"Reverse firewalls for adaptively secure MPC without setup","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8"},{"_id":"10613","issue":"3","month":"03","type":"journal_article","quality_controlled":"1","volume":27,"date_updated":"2025-06-26T11:57:53Z","acknowledgement":"F.S. would like to thank Mario Ayala and Frank Redig for useful discussions. J.P.C. acknowledges partial financial support from the US National Science Foundation (DMS-1855604). F.S. was financially supported by the European Union’s Horizon 2020 research and innovation programme under the Marie-Skłodowska-Curie grant agreement No. 754411.\r\n","day":"16","year":"2021","status":"public","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","arxiv":1,"external_id":{"arxiv":["2008.13403"]},"title":"Higher-order hydrodynamics and equilibrium fluctuations of interacting particle systems","page":"339-380","project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020"}],"abstract":[{"text":"Motivated by the recent preprint [\\emph{arXiv:2004.08412}] by Ayala, Carinci, and Redig, we first provide a general framework for the study of scaling limits of higher-order fields. Then, by considering the same class of infinite interacting particle systems as in [\\emph{arXiv:2004.08412}], namely symmetric simple exclusion and inclusion processes in the d-dimensional Euclidean lattice, we prove the hydrodynamic limit, and convergence for the equilibrium fluctuations, of higher-order fields. In particular, the limit fields exhibit a tensor structure. Our fluctuation result differs from that in [\\emph{arXiv:2004.08412}], since we considered-dimensional Euclidean lattice, we prove the hydrodynamic limit, and convergence for the equilibrium fluctuations, of higher-order fields. In particular, the limit fields exhibit a tensor structure. Our fluctuation result differs from that in [\\emph{arXiv:2004.08412}], since we consider a different notion of higher-order fluctuation fields.","lang":"eng"}],"citation":{"short":"J.P. Chen, F. Sau, Markov Processes And Related Fields 27 (2021) 339–380.","chicago":"Chen, Joe P., and Federico Sau. “Higher-Order Hydrodynamics and Equilibrium Fluctuations of Interacting Particle Systems.” <i>Markov Processes And Related Fields</i>. Polymat Publishing, 2021.","ista":"Chen JP, Sau F. 2021. Higher-order hydrodynamics and equilibrium fluctuations of interacting particle systems. Markov Processes And Related Fields. 27(3), 339–380.","ama":"Chen JP, Sau F. Higher-order hydrodynamics and equilibrium fluctuations of interacting particle systems. <i>Markov Processes And Related Fields</i>. 2021;27(3):339-380.","apa":"Chen, J. P., &#38; Sau, F. (2021). Higher-order hydrodynamics and equilibrium fluctuations of interacting particle systems. <i>Markov Processes And Related Fields</i>. Polymat Publishing.","mla":"Chen, Joe P., and Federico Sau. “Higher-Order Hydrodynamics and Equilibrium Fluctuations of Interacting Particle Systems.” <i>Markov Processes And Related Fields</i>, vol. 27, no. 3, Polymat Publishing, 2021, pp. 339–80.","ieee":"J. P. Chen and F. Sau, “Higher-order hydrodynamics and equilibrium fluctuations of interacting particle systems,” <i>Markov Processes And Related Fields</i>, vol. 27, no. 3. Polymat Publishing, pp. 339–380, 2021."},"publisher":"Polymat Publishing","corr_author":"1","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2008.13403"}],"date_published":"2021-03-16T00:00:00Z","oa_version":"Preprint","department":[{"_id":"JaMa"}],"publication_identifier":{"issn":["1024-2953"]},"oa":1,"related_material":{"link":[{"relation":"other","url":"http://math-mprf.org/journal/articles/id1614/","description":"Link to Abstract on publisher's website"},{"url":"https://arxiv.org/abs/2004.08412","description":"Referred to in Abstract","relation":"used_for_analysis_in"}]},"author":[{"last_name":"Chen","full_name":"Chen, Joe P.","first_name":"Joe P."},{"id":"E1836206-9F16-11E9-8814-AEFDE5697425","last_name":"Sau","full_name":"Sau, Federico","first_name":"Federico"}],"language":[{"iso":"eng"}],"date_created":"2022-01-10T14:02:31Z","keyword":["interacting particle systems","higher-order fields","hydrodynamic limit","equilibrium fluctuations","duality"],"intvolume":"        27","publication_status":"published","article_type":"original","publication":"Markov Processes And Related Fields","ec_funded":1,"article_processing_charge":"No"},{"ddc":["530"],"date_published":"2021-12-23T00:00:00Z","corr_author":"1","publisher":"IOP Publishing","citation":{"ieee":"A. Ghazaryan, E. M. Nica, O. Erten, and P. Ghaemi, “Shadow surface states in topological Kondo insulators,” <i>New Journal of Physics</i>, vol. 23, no. 12. IOP Publishing, 2021.","apa":"Ghazaryan, A., Nica, E. M., Erten, O., &#38; Ghaemi, P. (2021). Shadow surface states in topological Kondo insulators. <i>New Journal of Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1367-2630/ac4124\">https://doi.org/10.1088/1367-2630/ac4124</a>","mla":"Ghazaryan, Areg, et al. “Shadow Surface States in Topological Kondo Insulators.” <i>New Journal of Physics</i>, vol. 23, no. 12, 123042, IOP Publishing, 2021, doi:<a href=\"https://doi.org/10.1088/1367-2630/ac4124\">10.1088/1367-2630/ac4124</a>.","ama":"Ghazaryan A, Nica EM, Erten O, Ghaemi P. Shadow surface states in topological Kondo insulators. <i>New Journal of Physics</i>. 2021;23(12). doi:<a href=\"https://doi.org/10.1088/1367-2630/ac4124\">10.1088/1367-2630/ac4124</a>","short":"A. Ghazaryan, E.M. Nica, O. Erten, P. Ghaemi, New Journal of Physics 23 (2021).","chicago":"Ghazaryan, Areg, Emilian M. Nica, Onur Erten, and Pouyan Ghaemi. “Shadow Surface States in Topological Kondo Insulators.” <i>New Journal of Physics</i>. IOP Publishing, 2021. <a href=\"https://doi.org/10.1088/1367-2630/ac4124\">https://doi.org/10.1088/1367-2630/ac4124</a>.","ista":"Ghazaryan A, Nica EM, Erten O, Ghaemi P. 2021. Shadow surface states in topological Kondo insulators. New Journal of Physics. 23(12), 123042."},"oa":1,"publication_identifier":{"issn":["1367-2630"]},"file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2022-01-17T10:01:58Z","checksum":"0c3cb6816242fa8afd1cc87a5fe77821","success":1,"creator":"cchlebak","file_id":"10632","file_name":"2021_NewJourPhys_Ghazaryan.pdf","access_level":"open_access","date_updated":"2022-01-17T10:01:58Z","file_size":2533102}],"oa_version":"Published Version","department":[{"_id":"MiLe"}],"date_created":"2022-01-16T23:01:28Z","author":[{"full_name":"Ghazaryan, Areg","last_name":"Ghazaryan","id":"4AF46FD6-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-9666-3543","first_name":"Areg"},{"first_name":"Emilian M.","last_name":"Nica","full_name":"Nica, Emilian M."},{"full_name":"Erten, Onur","last_name":"Erten","first_name":"Onur"},{"last_name":"Ghaemi","full_name":"Ghaemi, Pouyan","first_name":"Pouyan"}],"language":[{"iso":"eng"}],"doi":"10.1088/1367-2630/ac4124","article_processing_charge":"No","ec_funded":1,"has_accepted_license":"1","publication":"New Journal of Physics","article_type":"original","publication_status":"published","isi":1,"intvolume":"        23","type":"journal_article","month":"12","issue":"12","_id":"10628","article_number":"123042","acknowledgement":"PG acknowledges support from National Science Foundation Awards No. DMR-1824265 for this work. AG acknowledges support from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 754411. EMN is supported by ASU startup grant. OE is in part supported by NSF-DMR-1904716.","volume":23,"date_updated":"2025-04-14T07:43:48Z","quality_controlled":"1","scopus_import":"1","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Shadow surface states in topological Kondo insulators","arxiv":1,"external_id":{"isi":["000734063700001"],"arxiv":["2012.11625"]},"status":"public","year":"2021","day":"23","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"abstract":[{"text":"The surface states of 3D topological insulators in general have negligible quantum oscillations (QOs) when the chemical potential is tuned to the Dirac points. In contrast, we find that topological Kondo insulators (TKIs) can support surface states with an arbitrarily large Fermi surface (FS) when the chemical potential is pinned to the Dirac point. We illustrate that these FSs give rise to finite-frequency QOs, which can become comparable to the extremal area of the unhybridized bulk bands. We show that this occurs when the crystal symmetry is lowered from cubic to tetragonal in a minimal two-orbital model. We label such surface modes as 'shadow surface states'. Moreover, we show that the sufficient next-nearest neighbor out-of-plane hybridization leading to shadow surface states can be self-consistently stabilized for tetragonal TKIs. Consequently, shadow surface states provide an important example of high-frequency QOs beyond the context of cubic TKIs.","lang":"eng"}],"project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020"}],"file_date_updated":"2022-01-17T10:01:58Z"},{"type":"conference","alternative_title":["LIPIcs"],"month":"11","_id":"10629","article_number":"42","date_updated":"2024-10-09T21:01:23Z","volume":213,"quality_controlled":"1","scopus_import":"1","title":"Quantitative verification on product graphs of small treewidth","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","status":"public","day":"29","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"year":"2021","abstract":[{"text":"Product graphs arise naturally in formal verification and program analysis. For example, the analysis of two concurrent threads requires the product of two component control-flow graphs, and for language inclusion of deterministic automata the product of two automata is constructed. In many cases, the component graphs have constant treewidth, e.g., when the input contains control-flow graphs of programs. We consider the algorithmic analysis of products of two constant-treewidth graphs with respect to three classic specification languages, namely, (a) algebraic properties, (b) mean-payoff properties, and (c) initial credit for energy properties.\r\nOur main contributions are as follows. Consider a graph G that is the product of two constant-treewidth graphs of size n each. First, given an idempotent semiring, we present an algorithm that computes the semiring transitive closure of G in time Õ(n⁴). Since the output has size Θ(n⁴), our algorithm is optimal (up to polylog factors). Second, given a mean-payoff objective, we present an O(n³)-time algorithm for deciding whether the value of a starting state is non-negative, improving the previously known O(n⁴) bound. Third, given an initial credit for energy objective, we present an O(n⁵)-time algorithm for computing the minimum initial credit for all nodes of G, improving the previously known O(n⁸) bound. At the heart of our approach lies an algorithm for the efficient construction of strongly-balanced tree decompositions of constant-treewidth graphs. Given a constant-treewidth graph G' of n nodes and a positive integer λ, our algorithm constructs a binary tree decomposition of G' of width O(λ) with the property that the size of each subtree decreases geometrically with rate (1/2 + 2^{-λ}).","lang":"eng"}],"file_date_updated":"2022-01-17T10:36:08Z","date_published":"2021-11-29T00:00:00Z","ddc":["000"],"corr_author":"1","citation":{"mla":"Chatterjee, Krishnendu, et al. “Quantitative Verification on Product Graphs of Small Treewidth.” <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>, vol. 213, 42, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021, doi:<a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.42\">10.4230/LIPIcs.FSTTCS.2021.42</a>.","apa":"Chatterjee, K., Ibsen-Jensen, R., &#38; Pavlogiannis, A. (2021). Quantitative verification on product graphs of small treewidth. In <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i> (Vol. 213). Virtual: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.42\">https://doi.org/10.4230/LIPIcs.FSTTCS.2021.42</a>","ieee":"K. Chatterjee, R. Ibsen-Jensen, and A. Pavlogiannis, “Quantitative verification on product graphs of small treewidth,” in <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>, Virtual, 2021, vol. 213.","ista":"Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. 2021. Quantitative verification on product graphs of small treewidth. 41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science. FSTTCS: Foundations of Software Technology and Theoretical Computer Science, LIPIcs, vol. 213, 42.","short":"K. Chatterjee, R. Ibsen-Jensen, A. Pavlogiannis, in:, 41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021.","chicago":"Chatterjee, Krishnendu, Rasmus Ibsen-Jensen, and Andreas Pavlogiannis. “Quantitative Verification on Product Graphs of Small Treewidth.” In <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>, Vol. 213. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021. <a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.42\">https://doi.org/10.4230/LIPIcs.FSTTCS.2021.42</a>.","ama":"Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. Quantitative verification on product graphs of small treewidth. In: <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>. Vol 213. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2021. doi:<a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.42\">10.4230/LIPIcs.FSTTCS.2021.42</a>"},"publisher":"Schloss Dagstuhl - Leibniz-Zentrum für Informatik","oa":1,"publication_identifier":{"issn":["1868-8969"],"isbn":["978-3-9597-7215-0"]},"conference":{"end_date":"2021-12-17","start_date":"2021-12-15","name":"FSTTCS: Foundations of Software Technology and Theoretical Computer Science","location":"Virtual"},"file":[{"date_updated":"2022-01-17T10:36:08Z","file_size":891566,"access_level":"open_access","file_name":"2021_LIPIcs_Chatterjee.pdf","success":1,"creator":"cchlebak","checksum":"71141acdeffa9056f24d6dbef952d254","date_created":"2022-01-17T10:36:08Z","file_id":"10633","content_type":"application/pdf","relation":"main_file"}],"department":[{"_id":"KrCh"}],"oa_version":"Published Version","date_created":"2022-01-16T23:01:28Z","language":[{"iso":"eng"}],"author":[{"full_name":"Chatterjee, Krishnendu","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","last_name":"Chatterjee","orcid":"0000-0002-4561-241X","first_name":"Krishnendu"},{"full_name":"Ibsen-Jensen, Rasmus","last_name":"Ibsen-Jensen","orcid":"0000-0003-4783-0389","id":"3B699956-F248-11E8-B48F-1D18A9856A87","first_name":"Rasmus"},{"full_name":"Pavlogiannis, Andreas","id":"49704004-F248-11E8-B48F-1D18A9856A87","last_name":"Pavlogiannis","orcid":"0000-0002-8943-0722","first_name":"Andreas"}],"has_accepted_license":"1","publication":"41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science","article_processing_charge":"No","doi":"10.4230/LIPIcs.FSTTCS.2021.42","publication_status":"published","intvolume":"       213"},{"_id":"10630","article_number":"34","type":"conference","alternative_title":["LIPIcs"],"month":"11","quality_controlled":"1","acknowledgement":"We like to thank Lukas Fleischer and Michael Wehar for our discussions. This work started at the Schloss Dagstuhl Event 20483 Moderne Aspekte der Komplexitätstheorie in der Automatentheorie https://www.dagstuhl.de/20483.\r\n","date_updated":"2025-05-14T10:53:59Z","volume":213,"status":"public","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"29","year":"2021","scopus_import":"1","arxiv":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"arxiv":["2110.01279"]},"title":"On the complexity of intersection non-emptiness for star-free language classes","project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020"}],"abstract":[{"text":"In the Intersection Non-emptiness problem, we are given a list of finite automata A_1, A_2,… , A_m over a common alphabet Σ as input, and the goal is to determine whether some string w ∈ Σ^* lies in the intersection of the languages accepted by the automata in the list. We analyze the complexity of the Intersection Non-emptiness problem under the promise that all input automata accept a language in some level of the dot-depth hierarchy, or some level of the Straubing-Thérien hierarchy. Automata accepting languages from the lowest levels of these hierarchies arise naturally in the context of model checking. We identify a dichotomy in the dot-depth hierarchy by showing that the problem is already NP-complete when all input automata accept languages of the levels B_0 or B_{1/2} and already PSPACE-hard when all automata accept a language from the level B_1. Conversely, we identify a tetrachotomy in the Straubing-Thérien hierarchy. More precisely, we show that the problem is in AC^0 when restricted to level L_0; complete for L or NL, depending on the input representation, when restricted to languages in the level L_{1/2}; NP-complete when the input is given as DFAs accepting a language in L_1 or L_{3/2}; and finally, PSPACE-complete when the input automata accept languages in level L_2 or higher. Moreover, we show that the proof technique used to show containment in NP for DFAs accepting languages in L_1 or L_{3/2} does not generalize to the context of NFAs. To prove this, we identify a family of languages that provide an exponential separation between the state complexity of general NFAs and that of partially ordered NFAs. To the best of our knowledge, this is the first superpolynomial separation between these two models of computation.","lang":"eng"}],"file_date_updated":"2022-01-17T10:49:03Z","corr_author":"1","citation":{"ama":"Arrighi E, Fernau H, Hoffmann S, et al. On the complexity of intersection non-emptiness for star-free language classes. In: <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>. Vol 213. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2021. doi:<a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.34\">10.4230/LIPIcs.FSTTCS.2021.34</a>","ista":"Arrighi E, Fernau H, Hoffmann S, Holzer M, Jecker IR, De Oliveira Oliveira M, Wolf P. 2021. On the complexity of intersection non-emptiness for star-free language classes. 41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science. FSTTCS: Foundations of Software Technology and Theoretical Computer Science, LIPIcs, vol. 213, 34.","short":"E. Arrighi, H. Fernau, S. Hoffmann, M. Holzer, I.R. Jecker, M. De Oliveira Oliveira, P. Wolf, in:, 41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021.","chicago":"Arrighi, Emmanuel, Henning Fernau, Stefan Hoffmann, Markus Holzer, Ismael R Jecker, Mateus De Oliveira Oliveira, and Petra Wolf. “On the Complexity of Intersection Non-Emptiness for Star-Free Language Classes.” In <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>, Vol. 213. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021. <a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.34\">https://doi.org/10.4230/LIPIcs.FSTTCS.2021.34</a>.","ieee":"E. Arrighi <i>et al.</i>, “On the complexity of intersection non-emptiness for star-free language classes,” in <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>, Virtual, 2021, vol. 213.","mla":"Arrighi, Emmanuel, et al. “On the Complexity of Intersection Non-Emptiness for Star-Free Language Classes.” <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i>, vol. 213, 34, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021, doi:<a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.34\">10.4230/LIPIcs.FSTTCS.2021.34</a>.","apa":"Arrighi, E., Fernau, H., Hoffmann, S., Holzer, M., Jecker, I. R., De Oliveira Oliveira, M., &#38; Wolf, P. (2021). On the complexity of intersection non-emptiness for star-free language classes. In <i>41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science</i> (Vol. 213). Virtual: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.FSTTCS.2021.34\">https://doi.org/10.4230/LIPIcs.FSTTCS.2021.34</a>"},"publisher":"Schloss Dagstuhl - Leibniz-Zentrum für Informatik","date_published":"2021-11-29T00:00:00Z","ddc":["000"],"publication_identifier":{"issn":["1868-8969"],"isbn":["978-3-9597-7215-0"]},"conference":{"location":"Virtual","start_date":"2021-12-15","end_date":"2021-12-17","name":"FSTTCS: Foundations of Software Technology and Theoretical Computer Science"},"department":[{"_id":"KrCh"}],"file":[{"success":1,"creator":"cchlebak","date_created":"2022-01-17T10:49:03Z","checksum":"d5a82ba893c3bc5da5914edbb3efb92b","file_id":"10634","content_type":"application/pdf","relation":"main_file","file_name":"2021_LIPIcs_Arrighi.pdf","date_updated":"2022-01-17T10:49:03Z","file_size":844224,"access_level":"open_access"}],"oa_version":"Published Version","oa":1,"language":[{"iso":"eng"}],"author":[{"first_name":"Emmanuel","full_name":"Arrighi, Emmanuel","last_name":"Arrighi"},{"first_name":"Henning","last_name":"Fernau","full_name":"Fernau, Henning"},{"first_name":"Stefan","full_name":"Hoffmann, Stefan","last_name":"Hoffmann"},{"first_name":"Markus","last_name":"Holzer","full_name":"Holzer, Markus"},{"first_name":"Ismael R","full_name":"Jecker, Ismael R","id":"85D7C63E-7D5D-11E9-9C0F-98C4E5697425","last_name":"Jecker"},{"full_name":"De Oliveira Oliveira, Mateus","last_name":"De Oliveira Oliveira","first_name":"Mateus"},{"full_name":"Wolf, Petra","last_name":"Wolf","first_name":"Petra"}],"date_created":"2022-01-16T23:01:29Z","publication_status":"published","intvolume":"       213","has_accepted_license":"1","ec_funded":1,"publication":"41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science","article_processing_charge":"No","doi":"10.4230/LIPIcs.FSTTCS.2021.34"},{"quality_controlled":"1","date_updated":"2025-03-31T16:00:55Z","volume":104,"acknowledgement":"I.C. acknowledges the support by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 665385. G.B. acknowledges support from the Austrian Science Fund (FWF), under project No. M2461-N27. M.L. acknowledges support by the Austrian Science Fund (FWF), under project No. P29902-N27, and by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON). H.S acknowledges support from the European Research Council-AdG (Project No. 320459, DropletControl) and from The Villum Foundation through a Villum Investigator grant no. 25886.","article_number":"L061303","_id":"10631","issue":"6","month":"12","type":"journal_article","project":[{"grant_number":"P29902","name":"Quantum rotations in the presence of a many-body environment","call_identifier":"FWF","_id":"26031614-B435-11E9-9278-68D0E5697425"},{"name":"Angulon: physics and applications of a new quasiparticle","grant_number":"801770","call_identifier":"H2020","_id":"2688CF98-B435-11E9-9278-68D0E5697425"},{"grant_number":"665385","name":"International IST Doctoral Program","call_identifier":"H2020","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"},{"grant_number":"M02641","name":"A path-integral approach to composite impurities","call_identifier":"FWF","_id":"26986C82-B435-11E9-9278-68D0E5697425"}],"abstract":[{"text":"We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet.","lang":"eng"}],"day":"30","year":"2021","status":"public","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","arxiv":1,"title":"Excited rotational states of molecules in a superfluid","external_id":{"arxiv":["2107.00468"],"isi":["000739618300001"]},"scopus_import":"1","department":[{"_id":"MiLe"}],"oa_version":"Preprint","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"oa":1,"citation":{"ama":"Cherepanov I, Bighin G, Schouder CA, et al. Excited rotational states of molecules in a superfluid. <i>Physical Review A</i>. 2021;104(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">10.1103/PhysRevA.104.L061303</a>","short":"I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, S.H. Albrechtsen, A.V. Muñoz, L. Christiansen, H. Stapelfeldt, M. Lemeshko, Physical Review A 104 (2021).","chicago":"Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley, Simon H. Albrechtsen, Alberto Viñas Muñoz, Lars Christiansen, Henrik Stapelfeldt, and Mikhail Lemeshko. “Excited Rotational States of Molecules in a Superfluid.” <i>Physical Review A</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">https://doi.org/10.1103/PhysRevA.104.L061303</a>.","ista":"Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Albrechtsen SH, Muñoz AV, Christiansen L, Stapelfeldt H, Lemeshko M. 2021. Excited rotational states of molecules in a superfluid. Physical Review A. 104(6), L061303.","ieee":"I. Cherepanov <i>et al.</i>, “Excited rotational states of molecules in a superfluid,” <i>Physical Review A</i>, vol. 104, no. 6. American Physical Society, 2021.","apa":"Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Albrechtsen, S. H., Muñoz, A. V., … Lemeshko, M. (2021). Excited rotational states of molecules in a superfluid. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">https://doi.org/10.1103/PhysRevA.104.L061303</a>","mla":"Cherepanov, Igor, et al. “Excited Rotational States of Molecules in a Superfluid.” <i>Physical Review A</i>, vol. 104, no. 6, L061303, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">10.1103/PhysRevA.104.L061303</a>."},"publisher":"American Physical Society","corr_author":"1","date_published":"2021-12-30T00:00:00Z","main_file_link":[{"open_access":"1","url":"http://128.84.4.18/abs/2107.00468"}],"intvolume":"       104","isi":1,"publication_status":"published","article_type":"original","ec_funded":1,"publication":"Physical Review A","doi":"10.1103/PhysRevA.104.L061303","article_processing_charge":"No","author":[{"id":"339C7E5A-F248-11E8-B48F-1D18A9856A87","last_name":"Cherepanov","full_name":"Cherepanov, Igor","first_name":"Igor"},{"first_name":"Giacomo","full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777","last_name":"Bighin"},{"last_name":"Schouder","full_name":"Schouder, Constant A.","first_name":"Constant A."},{"first_name":"Adam S.","last_name":"Chatterley","full_name":"Chatterley, Adam S."},{"last_name":"Albrechtsen","full_name":"Albrechtsen, Simon H.","first_name":"Simon H."},{"full_name":"Muñoz, Alberto Viñas","last_name":"Muñoz","first_name":"Alberto Viñas"},{"full_name":"Christiansen, Lars","last_name":"Christiansen","first_name":"Lars"},{"full_name":"Stapelfeldt, Henrik","last_name":"Stapelfeldt","first_name":"Henrik"},{"full_name":"Lemeshko, Mikhail","orcid":"0000-0002-6990-7802","last_name":"Lemeshko","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","first_name":"Mikhail"}],"language":[{"iso":"eng"}],"date_created":"2022-01-16T23:01:29Z"},{"intvolume":"         1","article_type":"original","publication_status":"published","doi":"10.24072/pcjournal.69","article_processing_charge":"No","ec_funded":1,"has_accepted_license":"1","publication":"Peer Community Journal","author":[{"first_name":"Michele","full_name":"Nardin, Michele","last_name":"Nardin","orcid":"0000-0001-8849-6570","id":"30BD0376-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Phillips","full_name":"Phillips, James W.","first_name":"James W."},{"first_name":"William F.","full_name":"Podlaski, William F.","last_name":"Podlaski"},{"last_name":"Keemink","full_name":"Keemink, Sander W.","first_name":"Sander W."}],"language":[{"iso":"eng"}],"date_created":"2022-01-17T11:12:40Z","file":[{"content_type":"application/pdf","relation":"main_file","checksum":"cd9af6b331918608f2e3d1c7940cbf4f","creator":"mnardin","date_created":"2022-01-17T11:15:26Z","success":1,"file_id":"10636","file_name":"10_24072_pcjournal_69.pdf","access_level":"open_access","date_updated":"2022-01-17T11:15:26Z","file_size":3311494}],"oa_version":"Published Version","department":[{"_id":"GradSch"},{"_id":"JoCs"}],"publication_identifier":{"eissn":["2804-3871"]},"oa":1,"publisher":"Peer Community In","citation":{"ieee":"M. Nardin, J. W. Phillips, W. F. Podlaski, and S. W. Keemink, “Nonlinear computations in spiking neural networks through multiplicative synapses,” <i>Peer Community Journal</i>, vol. 1. Peer Community In, 2021.","mla":"Nardin, Michele, et al. “Nonlinear Computations in Spiking Neural Networks through Multiplicative Synapses.” <i>Peer Community Journal</i>, vol. 1, e68, Peer Community In, 2021, doi:<a href=\"https://doi.org/10.24072/pcjournal.69\">10.24072/pcjournal.69</a>.","apa":"Nardin, M., Phillips, J. W., Podlaski, W. F., &#38; Keemink, S. W. (2021). Nonlinear computations in spiking neural networks through multiplicative synapses. <i>Peer Community Journal</i>. Peer Community In. <a href=\"https://doi.org/10.24072/pcjournal.69\">https://doi.org/10.24072/pcjournal.69</a>","ama":"Nardin M, Phillips JW, Podlaski WF, Keemink SW. Nonlinear computations in spiking neural networks through multiplicative synapses. <i>Peer Community Journal</i>. 2021;1. doi:<a href=\"https://doi.org/10.24072/pcjournal.69\">10.24072/pcjournal.69</a>","chicago":"Nardin, Michele, James W. Phillips, William F. Podlaski, and Sander W. Keemink. “Nonlinear Computations in Spiking Neural Networks through Multiplicative Synapses.” <i>Peer Community Journal</i>. Peer Community In, 2021. <a href=\"https://doi.org/10.24072/pcjournal.69\">https://doi.org/10.24072/pcjournal.69</a>.","ista":"Nardin M, Phillips JW, Podlaski WF, Keemink SW. 2021. Nonlinear computations in spiking neural networks through multiplicative synapses. Peer Community Journal. 1, e68.","short":"M. Nardin, J.W. Phillips, W.F. Podlaski, S.W. Keemink, Peer Community Journal 1 (2021)."},"corr_author":"1","ddc":["519"],"date_published":"2021-12-15T00:00:00Z","file_date_updated":"2022-01-17T11:15:26Z","abstract":[{"text":"The brain efficiently performs nonlinear computations through its intricate networks of spiking neurons, but how this is done remains elusive. While nonlinear computations can be implemented successfully in spiking neural networks, this requires supervised training and the resulting connectivity can be hard to interpret. In contrast, the required connectivity for any computation in the form of a linear dynamical system can be directly derived and understood with the spike coding network (SCN) framework. These networks also have biologically realistic activity patterns and are highly robust to cell death. Here we extend the SCN framework to directly implement any polynomial dynamical system, without the need for training. This results in networks requiring a mix of synapse types (fast, slow, and multiplicative), which we term multiplicative spike coding networks (mSCNs). Using mSCNs, we demonstrate how to directly derive the required connectivity for several nonlinear dynamical systems. We also show how to carry out higher-order polynomials with coupled networks that use only pair-wise multiplicative synapses, and provide expected numbers of connections for each synapse type. Overall, our work demonstrates a novel method for implementing nonlinear computations in spiking neural networks, while keeping the attractive features of standard SCNs (robustness, realistic activity patterns, and interpretable connectivity). Finally, we discuss the biological plausibility of our approach, and how the high accuracy and robustness of the approach may be of interest for neuromorphic computing.","lang":"eng"}],"project":[{"_id":"2564DBCA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"International IST Doctoral Program","grant_number":"665385"}],"year":"2021","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"15","status":"public","arxiv":1,"external_id":{"arxiv":["2009.03857"]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","title":"Nonlinear computations in spiking neural networks through multiplicative synapses","scopus_import":"1","quality_controlled":"1","volume":1,"date_updated":"2025-05-14T11:23:19Z","acknowledgement":"A preprint version of this article has been peer-reviewed and recommended by Peer Community In Neuroscience (DOI link to the recommendation: https://doi.org/10.24072/pci.cneuro.100003).\r\nWe thank Christian Machens and Nuno Calaim for useful discussions on the project. This report\r\ncame out of a collaboration started at the CAJAL Advanced Neuroscience Training Programme in\r\nComputational Neuroscience in Lisbon, Portugal, during the 2019 summer. The authors would\r\nlike to thank the participants, TAs, lecturers, and organizers of the summer school. SWK was\r\nsupported by the Simons Collaboration on the Global Brain (543009). WFP was supported by\r\nFCT (032077). MN was supported by European Union Horizon 2020 (665385).\r\n","article_number":"e68","_id":"10635","month":"12","type":"journal_article"},{"date_updated":"2026-06-18T08:45:11Z","oa":1,"quality_controlled":"1","oa_version":"Published Version","department":[{"_id":"JoFi"}],"date_published":"2021-04-20T00:00:00Z","ddc":["530"],"main_file_link":[{"url":"https://bluefors.com/blog/integrated-quantum-measurement-system/","open_access":"1"}],"type":"other_academic_publication","alternative_title":["Bluefors Blog"],"month":"04","place":"Helsinki, Finland","_id":"10644","citation":{"apa":"Lake, R., Simbierowicz, S., Krantz, P., Hassani, F., &#38; Fink, J. M. (2021). <i>The Bluefors dilution refrigerator as an integrated quantum measurement system</i>. Helsinki, Finland: Bluefors Oy.","mla":"Lake, Russell, et al. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System</i>. Bluefors Oy, 2021.","ieee":"R. Lake, S. Simbierowicz, P. Krantz, F. Hassani, and J. M. Fink, <i>The Bluefors dilution refrigerator as an integrated quantum measurement system</i>. Helsinki, Finland: Bluefors Oy, 2021.","short":"R. Lake, S. Simbierowicz, P. Krantz, F. Hassani, J.M. Fink, The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System, Bluefors Oy, Helsinki, Finland, 2021.","chicago":"Lake, Russell, Slawomir Simbierowicz, Philip Krantz, Farid Hassani, and Johannes M Fink. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy, 2021.","ista":"Lake R, Simbierowicz S, Krantz P, Hassani F, Fink JM. 2021. The Bluefors dilution refrigerator as an integrated quantum measurement system, Helsinki, Finland: Bluefors Oy, 9p.","ama":"Lake R, Simbierowicz S, Krantz P, Hassani F, Fink JM. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy; 2021."},"publisher":"Bluefors Oy","abstract":[{"lang":"eng","text":"The purpose of this application note is to demonstrate a working example of a superconducting qubit measurement in a Bluefors cryostat using the Keysight quantum control hardware. Our motivation is twofold. First, we provide pre-qualification data that the Bluefors cryostat, including filtering and wiring, can support long-lived qubits. Second, we demonstrate that the Keysight system (controlled using Labber) provides a straightforward solution to perform these characterization measurements. This document is intended as a brief guide for starting an experimental platform for testing superconducting qubits. The setup described here is an immediate jumping off point for a suite of applications including testing quantum logical gates, quantum optics with microwaves, or even using the qubit itself as a sensitive probe of local electromagnetic fields. Qubit measurements rely on high performance of both the physical sample environment and the measurement electronics. An overview of the cryogenic system is shown in Figure 1, and an overview of the integration between the electronics and cryostat (including wiring details) is shown in Figure 2."}],"article_processing_charge":"No","page":"9","publication_status":"published","date_created":"2022-01-19T08:29:57Z","title":"The Bluefors dilution refrigerator as an integrated quantum measurement system","keyword":["Application note"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"author":[{"full_name":"Lake, Russell","last_name":"Lake","first_name":"Russell"},{"first_name":"Slawomir","last_name":"Simbierowicz","full_name":"Simbierowicz, Slawomir"},{"full_name":"Krantz, Philip","last_name":"Krantz","first_name":"Philip"},{"first_name":"Farid","orcid":"0000-0001-6937-5773","last_name":"Hassani","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid"},{"last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8112-028X","full_name":"Fink, Johannes M","first_name":"Johannes M"}],"status":"public","day":"20","year":"2021"},{"quality_controlled":"1","oa_version":"Published Version","department":[{"_id":"JoFi"}],"date_updated":"2026-06-18T08:46:15Z","oa":1,"_id":"10645","citation":{"ama":"Simbierowicz S, Shi C, Collodo M, et al. <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy; 2021.","chicago":"Simbierowicz, Slawomir, Chunyan Shi, Michele Collodo, Moritz Kirste, Farid Hassani, Johannes M Fink, Jonas Bylander, Daniel Perez Lozano, and Russell Lake. <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy, 2021.","short":"S. Simbierowicz, C. Shi, M. Collodo, M. Kirste, F. Hassani, J.M. Fink, J. Bylander, D. Perez Lozano, R. Lake, Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System, Bluefors Oy, Helsinki, Finland, 2021.","ista":"Simbierowicz S, Shi C, Collodo M, Kirste M, Hassani F, Fink JM, Bylander J, Perez Lozano D, Lake R. 2021. Qubit energy-relaxation statistics in the Bluefors quantum measurement system, Helsinki, Finland: Bluefors Oy, 8p.","ieee":"S. Simbierowicz <i>et al.</i>, <i>Qubit energy-relaxation statistics in the Bluefors quantum measurement system</i>. Helsinki, Finland: Bluefors Oy, 2021.","apa":"Simbierowicz, S., Shi, C., Collodo, M., Kirste, M., Hassani, F., Fink, J. M., … Lake, R. (2021). <i>Qubit energy-relaxation statistics in the Bluefors quantum measurement system</i>. Helsinki, Finland: Bluefors Oy.","mla":"Simbierowicz, Slawomir, et al. <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>. Bluefors Oy, 2021."},"publisher":"Bluefors Oy","date_published":"2021-06-03T00:00:00Z","main_file_link":[{"url":"https://bluefors.com/blog/application-note-qubit-energy-relaxation-statistics-bluefors-quantum-measurement-system/","open_access":"1"}],"ddc":["530"],"type":"other_academic_publication","alternative_title":["Bluefors Blog"],"month":"06","place":"Helsinki, Finland","publication_status":"published","article_processing_charge":"No","abstract":[{"lang":"eng","text":"Superconducting qubits have emerged as a highly versatile and useful platform for quantum technological applications [1]. Bluefors and Zurich Instruments have supported the growth of this field from the 2010s onwards by providing well-engineered and reliable measurement infrastructure [2]– [6]. Having a long and stable qubit lifetime is a critical system property. Therefore, considerable effort has already gone into measuring qubit energy-relaxation timescales and their fluctuations, see Refs. [7]–[10] among others. Accurately extracting the statistics of a quantum device requires users to perform time consuming measurements. One measurement challenge is that the detection of the state-dependent\r\nresponse of a superconducting resonator due to a dispersively-coupled qubit requires an inherently low signal level. Consequently, measurements must be performed using a microwave probe that contains only a few microwave photons. Improving the signal-to-noise ratio (SNR) by using near-quantum limited parametric amplifiers as well as the use of optimized signal processing enabled by efficient room temperature instrumentation help to reduce measurement time. An empirical observation for fixed frequency transmons from recent literature is that as the energy-relaxation time 𝑇𝑇1 increases, so do its natural temporal fluctuations [7], [10]. This necessitates many repeated measurements to understand the statistics (see for example, Ref. [10]). In addition, as state-of-the-art qubits increase in lifetime, longer\r\nmeasurement times are expected to obtain accurate statistics. As described below, the scaling of the widths of the qubit energy-relaxation distributions also reveal clues about the origin of the energy-relaxation."}],"page":"8","language":[{"iso":"eng"}],"author":[{"first_name":"Slawomir","full_name":"Simbierowicz, Slawomir","last_name":"Simbierowicz"},{"first_name":"Chunyan","last_name":"Shi","full_name":"Shi, Chunyan"},{"full_name":"Collodo, Michele","last_name":"Collodo","first_name":"Michele"},{"last_name":"Kirste","full_name":"Kirste, Moritz","first_name":"Moritz"},{"id":"2AED110C-F248-11E8-B48F-1D18A9856A87","last_name":"Hassani","orcid":"0000-0001-6937-5773","full_name":"Hassani, Farid","first_name":"Farid"},{"first_name":"Johannes M","full_name":"Fink, Johannes M","last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8112-028X"},{"full_name":"Bylander, Jonas","last_name":"Bylander","first_name":"Jonas"},{"first_name":"Daniel","last_name":"Perez Lozano","full_name":"Perez Lozano, Daniel"},{"full_name":"Lake, Russell","last_name":"Lake","first_name":"Russell"}],"status":"public","day":"03","year":"2021","date_created":"2022-01-19T08:41:14Z","keyword":["Application note"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","title":"Qubit energy-relaxation statistics in the Bluefors quantum measurement system"},{"abstract":[{"text":"Adeno-associated viruses (AAVs) are widely used to deliver genetic material in vivo to distinct cell types such as neurons or glial cells, allowing for targeted manipulation. Transduction of microglia is mostly excluded from this strategy, likely due to the cells’ heterogeneous state upon environmental changes, which makes AAV design challenging. Here, we established the retina as a model system for microglial AAV validation and optimization. First, we show that AAV2/6 transduced microglia in both synaptic layers, where layer preference corresponds to the intravitreal or subretinal delivery method. Surprisingly, we observed significantly enhanced microglial transduction during photoreceptor degeneration. Thus, we modified the AAV6 capsid to reduce heparin binding by introducing four point mutations (K531E, R576Q, K493S, and K459S), resulting in increased microglial transduction in the outer plexiform layer. Finally, to improve microglial-specific transduction, we validated a Cre-dependent transgene delivery cassette for use in combination with the Cx3cr1CreERT2 mouse line. Together, our results provide a foundation for future studies optimizing AAV-mediated microglia transduction and highlight that environmental conditions influence microglial transduction efficiency.\r\n","lang":"eng"}],"project":[{"name":"Microglia action towards neuronal circuit formation and function in health and disease","grant_number":"715571","call_identifier":"H2020","_id":"25D4A630-B435-11E9-9278-68D0E5697425"}],"page":"210-224","file_date_updated":"2022-01-24T07:43:09Z","scopus_import":"1","external_id":{"isi":["000748748500019"]},"title":"Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor degenerative environment","user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","status":"public","year":"2021","day":"10","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"acknowledgement":"This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 715571). The research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by the Bioimaging Facility, the Life Science Facility, and the Pre-Clinical Facility, namely Sonja Haslinger and Michael Schunn for their animal colony management and support. We would also like to thank Chakrabarty Lab for sharing the plasmids for AAV2/6 production. Finally, we would like to thank the Siegert team members for discussion about the manuscript.","volume":23,"date_updated":"2025-04-14T07:41:46Z","quality_controlled":"1","type":"journal_article","month":"12","_id":"10655","doi":"10.1016/j.omtm.2021.09.006","acknowledged_ssus":[{"_id":"Bio"},{"_id":"LifeSc"},{"_id":"PreCl"}],"article_processing_charge":"Yes","ec_funded":1,"publication":"Molecular Therapy - Methods and Clinical Development","has_accepted_license":"1","article_type":"original","publication_status":"published","intvolume":"        23","isi":1,"date_created":"2022-01-23T23:01:28Z","language":[{"iso":"eng"}],"author":[{"first_name":"Margaret E","id":"3838F452-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-9642-1085","last_name":"Maes","full_name":"Maes, Margaret E"},{"first_name":"Gabriele M.","full_name":"Wögenstein, Gabriele M.","last_name":"Wögenstein"},{"full_name":"Colombo, Gloria","id":"3483CF6C-F248-11E8-B48F-1D18A9856A87","last_name":"Colombo","orcid":"0000-0001-9434-8902","first_name":"Gloria"},{"full_name":"Casado Polanco, Raquel","orcid":"0000-0001-8293-4568","last_name":"Casado Polanco","id":"15240fc1-dbcd-11ea-9d1d-ac5a786425fd","first_name":"Raquel"},{"first_name":"Sandra","last_name":"Siegert","id":"36ACD32E-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8635-0877","full_name":"Siegert, Sandra"}],"oa":1,"publication_identifier":{"eissn":["2329-0501"]},"file":[{"date_updated":"2022-01-24T07:43:09Z","file_size":4794147,"access_level":"open_access","creator":"cchlebak","checksum":"77dc540e8011c5475031bdf6ccef20a6","success":1,"date_created":"2022-01-24T07:43:09Z","file_id":"10657","content_type":"application/pdf","relation":"main_file","file_name":"2021_MolTherMethodsClinDev_Maes.pdf"}],"department":[{"_id":"SaSi"},{"_id":"SiHi"}],"oa_version":"Published Version","date_published":"2021-12-10T00:00:00Z","ddc":["570"],"corr_author":"1","publisher":"Elsevier","citation":{"ieee":"M. E. Maes, G. M. Wögenstein, G. Colombo, R. Casado Polanco, and S. Siegert, “Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor degenerative environment,” <i>Molecular Therapy - Methods and Clinical Development</i>, vol. 23. Elsevier, pp. 210–224, 2021.","apa":"Maes, M. E., Wögenstein, G. M., Colombo, G., Casado Polanco, R., &#38; Siegert, S. (2021). Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor degenerative environment. <i>Molecular Therapy - Methods and Clinical Development</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.omtm.2021.09.006\">https://doi.org/10.1016/j.omtm.2021.09.006</a>","mla":"Maes, Margaret E., et al. “Optimizing AAV2/6 Microglial Targeting Identified Enhanced Efficiency in the Photoreceptor Degenerative Environment.” <i>Molecular Therapy - Methods and Clinical Development</i>, vol. 23, Elsevier, 2021, pp. 210–24, doi:<a href=\"https://doi.org/10.1016/j.omtm.2021.09.006\">10.1016/j.omtm.2021.09.006</a>.","ama":"Maes ME, Wögenstein GM, Colombo G, Casado Polanco R, Siegert S. Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor degenerative environment. <i>Molecular Therapy - Methods and Clinical Development</i>. 2021;23:210-224. doi:<a href=\"https://doi.org/10.1016/j.omtm.2021.09.006\">10.1016/j.omtm.2021.09.006</a>","short":"M.E. Maes, G.M. Wögenstein, G. Colombo, R. Casado Polanco, S. Siegert, Molecular Therapy - Methods and Clinical Development 23 (2021) 210–224.","ista":"Maes ME, Wögenstein GM, Colombo G, Casado Polanco R, Siegert S. 2021. Optimizing AAV2/6 microglial targeting identified enhanced efficiency in the photoreceptor degenerative environment. Molecular Therapy - Methods and Clinical Development. 23, 210–224.","chicago":"Maes, Margaret E, Gabriele M. Wögenstein, Gloria Colombo, Raquel Casado Polanco, and Sandra Siegert. “Optimizing AAV2/6 Microglial Targeting Identified Enhanced Efficiency in the Photoreceptor Degenerative Environment.” <i>Molecular Therapy - Methods and Clinical Development</i>. Elsevier, 2021. <a href=\"https://doi.org/10.1016/j.omtm.2021.09.006\">https://doi.org/10.1016/j.omtm.2021.09.006</a>."}},{"date_published":"2021-05-28T00:00:00Z","ddc":["000"],"main_file_link":[{"url":"https://ojs.aaai.org/index.php/AAAI/article/view/16496","open_access":"1"}],"corr_author":"1","publisher":"AAAI Press","citation":{"chicago":"Henzinger, Thomas A, Mathias Lechner, and Dorde Zikelic. “Scalable Verification of Quantized Neural Networks.” In <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>, 35:3787–95. AAAI Press, 2021.","short":"T.A. Henzinger, M. Lechner, D. Zikelic, in:, Proceedings of the AAAI Conference on Artificial Intelligence, AAAI Press, 2021, pp. 3787–3795.","ista":"Henzinger TA, Lechner M, Zikelic D. 2021. Scalable verification of quantized neural networks. Proceedings of the AAAI Conference on Artificial Intelligence. AAAI: Association for the Advancement of Artificial Intelligence, Technical Tracks, vol. 35, 3787–3795.","ama":"Henzinger TA, Lechner M, Zikelic D. Scalable verification of quantized neural networks. In: <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>. Vol 35. AAAI Press; 2021:3787-3795.","apa":"Henzinger, T. A., Lechner, M., &#38; Zikelic, D. (2021). Scalable verification of quantized neural networks. In <i>Proceedings of the AAAI Conference on Artificial Intelligence</i> (Vol. 35, pp. 3787–3795). Virtual: AAAI Press.","mla":"Henzinger, Thomas A., et al. “Scalable Verification of Quantized Neural Networks.” <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>, vol. 35, no. 5A, AAAI Press, 2021, pp. 3787–95.","ieee":"T. A. Henzinger, M. Lechner, and D. Zikelic, “Scalable verification of quantized neural networks,” in <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>, Virtual, 2021, vol. 35, no. 5A, pp. 3787–3795."},"oa":1,"publication_identifier":{"eissn":["2374-3468"],"issn":["2159-5399"],"isbn":["978-1-57735-866-4"]},"oa_version":"Published Version","file":[{"date_updated":"2022-01-26T07:41:16Z","file_size":137235,"access_level":"open_access","date_created":"2022-01-26T07:41:16Z","success":1,"creator":"mlechner","checksum":"2bc8155b2526a70fba5b7301bc89dbd1","file_id":"10684","content_type":"application/pdf","relation":"main_file","file_name":"16496-Article Text-19990-1-2-20210518 (1).pdf"}],"department":[{"_id":"GradSch"},{"_id":"ToHe"}],"conference":{"location":"Virtual","name":"AAAI: Association for the Advancement of Artificial Intelligence","start_date":"2021-02-02","end_date":"2021-02-09"},"date_created":"2022-01-25T15:15:02Z","language":[{"iso":"eng"}],"author":[{"full_name":"Henzinger, Thomas A","id":"40876CD8-F248-11E8-B48F-1D18A9856A87","last_name":"Henzinger","orcid":"0000-0002-2985-7724","first_name":"Thomas A"},{"first_name":"Mathias","full_name":"Lechner, Mathias","id":"3DC22916-F248-11E8-B48F-1D18A9856A87","last_name":"Lechner"},{"first_name":"Dorde","full_name":"Zikelic, Dorde","orcid":"0000-0002-4681-1699","last_name":"Zikelic","id":"294AA7A6-F248-11E8-B48F-1D18A9856A87"}],"related_material":{"record":[{"id":"11362","relation":"dissertation_contains","status":"public"}]},"article_processing_charge":"No","ec_funded":1,"has_accepted_license":"1","publication":"Proceedings of the AAAI Conference on Artificial Intelligence","publication_status":"published","intvolume":"        35","type":"conference","month":"05","issue":"5A","alternative_title":["Technical Tracks"],"_id":"10665","acknowledgement":"This research was supported in part by the Austrian Science Fund (FWF) under grant Z211-N23 (Wittgenstein\r\nAward), ERC CoG 863818 (FoRM-SMArt), and the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 665385.\r\n","date_updated":"2026-04-07T14:21:58Z","volume":35,"quality_controlled":"1","scopus_import":"1","title":"Scalable verification of quantized neural networks","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","arxiv":1,"external_id":{"arxiv":["2012.08185"]},"status":"public","year":"2021","day":"28","abstract":[{"lang":"eng","text":"Formal verification of neural networks is an active topic of research, and recent advances have significantly increased the size of the networks that verification tools can handle. However, most methods are designed for verification of an idealized model of the actual network which works over real arithmetic and ignores rounding imprecisions. This idealization is in stark contrast to network quantization, which is a technique that trades numerical precision for computational efficiency and is, therefore, often applied in practice. Neglecting rounding errors of such low-bit quantized neural networks has been shown to lead to wrong conclusions about the network’s correctness. Thus, the desired approach for verifying quantized neural networks would be one that takes these rounding errors\r\ninto account. In this paper, we show that verifying the bitexact implementation of quantized neural networks with bitvector specifications is PSPACE-hard, even though verifying idealized real-valued networks and satisfiability of bit-vector specifications alone are each in NP. Furthermore, we explore several practical heuristics toward closing the complexity gap between idealized and bit-exact verification. In particular, we propose three techniques for making SMT-based verification of quantized neural networks more scalable. Our experiments demonstrate that our proposed methods allow a speedup of up to three orders of magnitude over existing approaches."}],"project":[{"_id":"2564DBCA-B435-11E9-9278-68D0E5697425","name":"International IST Doctoral Program","grant_number":"665385","call_identifier":"H2020"},{"name":"Formal methods for the design and analysis of complex systems","grant_number":"Z211","call_identifier":"FWF","_id":"25F42A32-B435-11E9-9278-68D0E5697425"},{"call_identifier":"H2020","grant_number":"863818","name":"Formal Methods for Stochastic Models: Algorithms and Applications","_id":"0599E47C-7A3F-11EA-A408-12923DDC885E"}],"page":"3787-3795","file_date_updated":"2022-01-26T07:41:16Z"},{"page":"478-489","file_date_updated":"2022-01-26T07:38:32Z","abstract":[{"text":"Robustness to variations in lighting conditions is a key objective for any deep vision system. To this end, our paper extends the receptive field of convolutional neural networks with two residual components, ubiquitous in the visual processing system of vertebrates: On-center and off-center pathways, with an excitatory center and inhibitory surround; OOCS for short. The On-center pathway is excited by the presence of a light stimulus in its center, but not in its surround, whereas the Off-center pathway is excited by the absence of a light stimulus in its center, but not in its surround. We design OOCS pathways via a difference of Gaussians, with their variance computed analytically from the size of the receptive fields. OOCS pathways complement each other in their response to light stimuli, ensuring this way a strong edge-detection capability, and as a result an accurate and robust inference under challenging lighting conditions. We provide extensive empirical evidence showing that networks supplied with OOCS pathways gain accuracy and illumination-robustness from the novel edge representation, compared to other baselines.","lang":"eng"}],"project":[{"_id":"25F42A32-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"Formal methods for the design and analysis of complex systems","grant_number":"Z211"}],"year":"2021","day":"01","tmp":{"short":"CC BY-NC-ND (3.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode","image":"/images/cc_by_nc_nd.png","name":"Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)"},"status":"public","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","arxiv":1,"title":"On-off center-surround receptive fields for accurate and robust image classification","external_id":{"arxiv":["2106.07091"]},"license":"https://creativecommons.org/licenses/by-nc-nd/3.0/","quality_controlled":"1","date_updated":"2025-05-19T11:28:08Z","volume":139,"acknowledgement":"Z.B. is supported by the Doctoral College Resilient Embedded Systems, which is run jointly by the TU Wien’s Faculty of Informatics and the UAS Technikum Wien. R.G. is partially supported by the Horizon 2020 Era-Permed project Persorad, and ECSEL Project grant no. 783163 (iDev40). R.H and D.R were partially supported by Boeing and MIT. M.L. is supported in part by the Austrian Science Fund (FWF) under grant Z211-N23 (Wittgenstein Award).","_id":"10668","month":"07","alternative_title":["PMLR"],"type":"conference","intvolume":"       139","publication_status":"published","article_processing_charge":"No","has_accepted_license":"1","publication":"Proceedings of the 38th International Conference on Machine Learning","author":[{"first_name":"Zahra","full_name":"Babaiee, Zahra","last_name":"Babaiee"},{"first_name":"Ramin","full_name":"Hasani, Ramin","last_name":"Hasani"},{"first_name":"Mathias","last_name":"Lechner","id":"3DC22916-F248-11E8-B48F-1D18A9856A87","full_name":"Lechner, Mathias"},{"first_name":"Daniela","last_name":"Rus","full_name":"Rus, Daniela"},{"last_name":"Grosu","full_name":"Grosu, Radu","first_name":"Radu"}],"language":[{"iso":"eng"}],"date_created":"2022-01-25T15:46:33Z","oa_version":"Published Version","department":[{"_id":"GradSch"},{"_id":"ToHe"}],"file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2022-01-26T07:38:32Z","checksum":"d30eae62561bb517d9f978437d7677db","creator":"mlechner","success":1,"file_id":"10681","file_name":"babaiee21a.pdf","access_level":"open_access","date_updated":"2022-01-26T07:38:32Z","file_size":4246561}],"conference":{"location":"Virtual","end_date":"2021-07-24","start_date":"2021-07-18","name":"ML: Machine Learning"},"publication_identifier":{"issn":["2640-3498"]},"oa":1,"publisher":"ML Research Press","citation":{"chicago":"Babaiee, Zahra, Ramin Hasani, Mathias Lechner, Daniela Rus, and Radu Grosu. “On-off Center-Surround Receptive Fields for Accurate and Robust Image Classification.” In <i>Proceedings of the 38th International Conference on Machine Learning</i>, 139:478–89. ML Research Press, 2021.","ista":"Babaiee Z, Hasani R, Lechner M, Rus D, Grosu R. 2021. On-off center-surround receptive fields for accurate and robust image classification. Proceedings of the 38th International Conference on Machine Learning. ML: Machine Learning, PMLR, vol. 139, 478–489.","short":"Z. Babaiee, R. Hasani, M. Lechner, D. Rus, R. Grosu, in:, Proceedings of the 38th International Conference on Machine Learning, ML Research Press, 2021, pp. 478–489.","ama":"Babaiee Z, Hasani R, Lechner M, Rus D, Grosu R. On-off center-surround receptive fields for accurate and robust image classification. In: <i>Proceedings of the 38th International Conference on Machine Learning</i>. Vol 139. ML Research Press; 2021:478-489.","apa":"Babaiee, Z., Hasani, R., Lechner, M., Rus, D., &#38; Grosu, R. (2021). On-off center-surround receptive fields for accurate and robust image classification. In <i>Proceedings of the 38th International Conference on Machine Learning</i> (Vol. 139, pp. 478–489). Virtual: ML Research Press.","mla":"Babaiee, Zahra, et al. “On-off Center-Surround Receptive Fields for Accurate and Robust Image Classification.” <i>Proceedings of the 38th International Conference on Machine Learning</i>, vol. 139, ML Research Press, 2021, pp. 478–89.","ieee":"Z. Babaiee, R. Hasani, M. Lechner, D. Rus, and R. Grosu, “On-off center-surround receptive fields for accurate and robust image classification,” in <i>Proceedings of the 38th International Conference on Machine Learning</i>, Virtual, 2021, vol. 139, pp. 478–489."},"ddc":["000"],"main_file_link":[{"url":"https://proceedings.mlr.press/v139/babaiee21a","open_access":"1"}],"date_published":"2021-07-01T00:00:00Z"},{"has_accepted_license":"1","publication":"Proceedings of the AAAI Conference on Artificial Intelligence","article_processing_charge":"No","intvolume":"        35","publication_status":"published","date_created":"2022-01-25T15:47:20Z","author":[{"first_name":"Sophie","full_name":"Grunbacher, Sophie","last_name":"Grunbacher"},{"first_name":"Ramin","full_name":"Hasani, Ramin","last_name":"Hasani"},{"first_name":"Mathias","id":"3DC22916-F248-11E8-B48F-1D18A9856A87","last_name":"Lechner","full_name":"Lechner, Mathias"},{"first_name":"Jacek","last_name":"Cyranka","full_name":"Cyranka, Jacek"},{"first_name":"Scott A","full_name":"Smolka, Scott A","last_name":"Smolka"},{"last_name":"Grosu","full_name":"Grosu, Radu","first_name":"Radu"}],"language":[{"iso":"eng"}],"oa":1,"conference":{"location":"Virtual","name":"AAAI: Association for the Advancement of Artificial Intelligence","start_date":"2021-02-02","end_date":"2021-02-09"},"department":[{"_id":"GradSch"},{"_id":"ToHe"}],"file":[{"file_name":"17372-Article Text-20866-1-2-20210518.pdf","file_id":"10680","creator":"mlechner","success":1,"checksum":"468d07041e282a1d46ffdae92f709630","date_created":"2022-01-26T07:38:08Z","relation":"main_file","content_type":"application/pdf","file_size":286906,"date_updated":"2022-01-26T07:38:08Z","access_level":"open_access"}],"oa_version":"Published Version","publication_identifier":{"isbn":["978-1-57735-866-4"],"issn":["2159-5399"],"eissn":["2374-3468"]},"date_published":"2021-05-28T00:00:00Z","main_file_link":[{"url":"https://ojs.aaai.org/index.php/AAAI/article/view/17372","open_access":"1"}],"ddc":["000"],"citation":{"ama":"Grunbacher S, Hasani R, Lechner M, Cyranka J, Smolka SA, Grosu R. On the verification of neural ODEs with stochastic guarantees. In: <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>. Vol 35. AAAI Press; 2021:11525-11535.","chicago":"Grunbacher, Sophie, Ramin Hasani, Mathias Lechner, Jacek Cyranka, Scott A Smolka, and Radu Grosu. “On the Verification of Neural ODEs with Stochastic Guarantees.” In <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>, 35:11525–35. AAAI Press, 2021.","short":"S. Grunbacher, R. Hasani, M. Lechner, J. Cyranka, S.A. Smolka, R. Grosu, in:, Proceedings of the AAAI Conference on Artificial Intelligence, AAAI Press, 2021, pp. 11525–11535.","ista":"Grunbacher S, Hasani R, Lechner M, Cyranka J, Smolka SA, Grosu R. 2021. On the verification of neural ODEs with stochastic guarantees. Proceedings of the AAAI Conference on Artificial Intelligence. AAAI: Association for the Advancement of Artificial Intelligence, Technical Tracks, vol. 35, 11525–11535.","ieee":"S. Grunbacher, R. Hasani, M. Lechner, J. Cyranka, S. A. Smolka, and R. Grosu, “On the verification of neural ODEs with stochastic guarantees,” in <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>, Virtual, 2021, vol. 35, no. 13, pp. 11525–11535.","apa":"Grunbacher, S., Hasani, R., Lechner, M., Cyranka, J., Smolka, S. A., &#38; Grosu, R. (2021). On the verification of neural ODEs with stochastic guarantees. In <i>Proceedings of the AAAI Conference on Artificial Intelligence</i> (Vol. 35, pp. 11525–11535). Virtual: AAAI Press.","mla":"Grunbacher, Sophie, et al. “On the Verification of Neural ODEs with Stochastic Guarantees.” <i>Proceedings of the AAAI Conference on Artificial Intelligence</i>, vol. 35, no. 13, AAAI Press, 2021, pp. 11525–35."},"publisher":"AAAI Press","corr_author":"1","page":"11525-11535","file_date_updated":"2022-01-26T07:38:08Z","project":[{"_id":"25F42A32-B435-11E9-9278-68D0E5697425","grant_number":"Z211","name":"Formal methods for the design and analysis of complex systems","call_identifier":"FWF"}],"abstract":[{"text":"We show that Neural ODEs, an emerging class of timecontinuous neural networks, can be verified by solving a set of global-optimization problems. For this purpose, we introduce Stochastic Lagrangian Reachability (SLR), an\r\nabstraction-based technique for constructing a tight Reachtube (an over-approximation of the set of reachable states\r\nover a given time-horizon), and provide stochastic guarantees in the form of confidence intervals for the Reachtube bounds. SLR inherently avoids the infamous wrapping effect (accumulation of over-approximation errors) by performing local optimization steps to expand safe regions instead of repeatedly forward-propagating them as is done by deterministic reachability methods. To enable fast local optimizations, we introduce a novel forward-mode adjoint sensitivity method to compute gradients without the need for backpropagation. Finally, we establish asymptotic and non-asymptotic convergence rates for SLR.","lang":"eng"}],"title":"On the verification of neural ODEs with stochastic guarantees","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"arxiv":["2012.08863"]},"arxiv":1,"day":"28","year":"2021","status":"public","date_updated":"2025-04-15T06:25:56Z","volume":35,"acknowledgement":"The authors would like to thank the reviewers for their insightful comments. RH and RG were partially supported by\r\nHorizon-2020 ECSEL Project grant No. 783163 (iDev40). RH was partially supported by Boeing. ML was supported\r\nin part by the Austrian Science Fund (FWF) under grant Z211-N23 (Wittgenstein Award). SG was funded by FWF\r\nproject W1255-N23. JC was partially supported by NAWA Polish Returns grant PPN/PPO/2018/1/00029. SS was supported by NSF awards DCL-2040599, CCF-1918225, and CPS-1446832.\r\n","quality_controlled":"1","issue":"13","alternative_title":["Technical Tracks"],"month":"05","type":"conference","_id":"10669"}]