--- _id: '15224' abstract: - lang: eng text: When a star exhausts its nuclear fuel, it either explodes as a supernova or more quiescently becomes a white dwarf, an object about half the mass of our Sun with a radius of about that of the Earth. About one-fifth of white dwarfs exhibit the presence of magnetic fields, whose origin has long been debated as either the product of previous stages of evolution or of binary interactions. We here report the discovery of two massive and magnetic white-dwarf members of young star clusters in the Gaia second data release (DR2) database, while a third massive and magnetic cluster white dwarf was already reported in a previous paper. These stars are most likely the product of single-star evolution and therefore challenge the merger scenario as the only way to produce magnetic white dwarfs. The progenitor masses of these stars are all above 5 solar masses, and there are only two other cluster white dwarfs whose distances have been unambiguously measured with Gaia and whose progenitors' masses fall in this range. This high incidence of magnetic white dwarfs indicates that intermediate-mass progenitors are more likely to produce magnetic remnants and that a fraction of magnetic white dwarfs forms from intermediate-mass stars. article_number: L14 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Ilaria full_name: Caiazzo, Ilaria id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d last_name: Caiazzo orcid: 0000-0002-4770-5388 - first_name: Jeremy full_name: Heyl, Jeremy last_name: Heyl - first_name: Harvey full_name: Richer, Harvey last_name: Richer - first_name: Jeffrey full_name: Cummings, Jeffrey last_name: Cummings - first_name: Leesa full_name: Fleury, Leesa last_name: Fleury - first_name: James full_name: Hegarty, James last_name: Hegarty - first_name: Jason full_name: Kalirai, Jason last_name: Kalirai - first_name: Ronan full_name: Kerr, Ronan last_name: Kerr - first_name: Sarah full_name: Thiele, Sarah last_name: Thiele - first_name: Pier-Emmanuel full_name: Tremblay, Pier-Emmanuel last_name: Tremblay - first_name: Michael full_name: Villanueva, Michael last_name: Villanueva citation: ama: Caiazzo I, Heyl J, Richer H, et al. Intermediate-mass stars become magnetic white dwarfs. The Astrophysical Journal Letters. 2020;901(1). doi:10.3847/2041-8213/abb5f7 apa: Caiazzo, I., Heyl, J., Richer, H., Cummings, J., Fleury, L., Hegarty, J., … Villanueva, M. (2020). Intermediate-mass stars become magnetic white dwarfs. The Astrophysical Journal Letters. American Astronomical Society. https://doi.org/10.3847/2041-8213/abb5f7 chicago: Caiazzo, Ilaria, Jeremy Heyl, Harvey Richer, Jeffrey Cummings, Leesa Fleury, James Hegarty, Jason Kalirai, et al. “Intermediate-Mass Stars Become Magnetic White Dwarfs.” The Astrophysical Journal Letters. American Astronomical Society, 2020. https://doi.org/10.3847/2041-8213/abb5f7. ieee: I. Caiazzo et al., “Intermediate-mass stars become magnetic white dwarfs,” The Astrophysical Journal Letters, vol. 901, no. 1. American Astronomical Society, 2020. ista: Caiazzo I, Heyl J, Richer H, Cummings J, Fleury L, Hegarty J, Kalirai J, Kerr R, Thiele S, Tremblay P-E, Villanueva M. 2020. Intermediate-mass stars become magnetic white dwarfs. The Astrophysical Journal Letters. 901(1), L14. mla: Caiazzo, Ilaria, et al. “Intermediate-Mass Stars Become Magnetic White Dwarfs.” The Astrophysical Journal Letters, vol. 901, no. 1, L14, American Astronomical Society, 2020, doi:10.3847/2041-8213/abb5f7. short: I. Caiazzo, J. Heyl, H. Richer, J. Cummings, L. Fleury, J. Hegarty, J. Kalirai, R. Kerr, S. Thiele, P.-E. Tremblay, M. Villanueva, The Astrophysical Journal Letters 901 (2020). date_created: 2024-03-26T10:35:02Z date_published: 2020-09-22T00:00:00Z date_updated: 2024-10-14T12:33:09Z day: '22' doi: 10.3847/2041-8213/abb5f7 extern: '1' external_id: arxiv: - '2009.03374' intvolume: ' 901' issue: '1' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2009.03374 month: '09' oa: 1 oa_version: Preprint publication: The Astrophysical Journal Letters publication_identifier: eissn: - 2041-8213 issn: - 2041-8205 publication_status: published publisher: American Astronomical Society quality_controlled: '1' scopus_import: '1' status: public title: Intermediate-mass stars become magnetic white dwarfs type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 901 year: '2020' ... --- _id: '15228' abstract: - lang: eng text: We describe a new implementation of a broad-band soft X-ray polarimeter, substantially based on a previous design. This implementation, the Pioneer Soft X-ray Polarimeter (PiSoX) is a SmallSat, designed for NASA’s call for Astrophysics Pioneers, small missions that could be CubeSats, balloon experiments, or SmallSats. As in REDSoX, the grating arrangement is designed optimally for the purpose of polarimetry with broad-band focussing optics by matching the dispersion of the spectrometer channels to laterally graded multilayers (LGMLs). The system can achieve polarization modulation factors over 90%. For PiSoX, the optics are lightweight Si mirrors in a one-bounce parabolic configuration. High efficiency, blazed gratings from opposite sectors are oriented to disperse to a LGML forming a channel covering the wavelength range from 35 Å to 75 Å (165 - 350 eV). Upon satellite rotation, the intensities of the dispersed spectra, after reflection and polarizing by the LGMLs, give the three Stokes parameters needed to determine a source’s linear polarization fraction and orientation. The design can be extended to higher energies as LGMLs are developed further. We describe examples of the potential scientific return from instruments based on this design. article_number: 114442Y article_processing_charge: No arxiv: 1 author: - first_name: Herman L. full_name: Marshall, Herman L. last_name: Marshall - first_name: Sarah full_name: Heine, Sarah last_name: Heine - first_name: Alan full_name: Garner, Alan last_name: Garner - first_name: Eric full_name: Gullikson, Eric last_name: Gullikson - first_name: Moritz full_name: Guenther, Moritz last_name: Guenther - first_name: Christopher full_name: Leitz, Christopher last_name: Leitz - first_name: Rebecca full_name: Masterson, Rebecca last_name: Masterson - first_name: Eric full_name: Miller, Eric last_name: Miller - first_name: William full_name: Zhang, William last_name: Zhang - first_name: Rozenn full_name: Boissay Malaquin, Rozenn last_name: Boissay Malaquin - first_name: Ilaria full_name: Caiazzo, Ilaria id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d last_name: Caiazzo orcid: 0000-0002-4770-5388 - first_name: Deepto full_name: Chakrabarty, Deepto last_name: Chakrabarty - first_name: Rosemary full_name: Davidson, Rosemary last_name: Davidson - first_name: Luigi full_name: Gallo, Luigi last_name: Gallo - first_name: Ralf K. full_name: Heilmann, Ralf K. last_name: Heilmann - first_name: Jeremy full_name: Heyl, Jeremy last_name: Heyl - first_name: Erin full_name: Kara, Erin last_name: Kara - first_name: Alan full_name: Marscher, Alan last_name: Marscher - first_name: Norbert full_name: Schulz, Norbert last_name: Schulz citation: ama: 'Marshall HL, Heine S, Garner A, et al. A small satellite version of a soft x-ray polarimeter. In: Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray. Vol 11444. SPIE; 2020. doi:10.1117/12.2562811' apa: 'Marshall, H. L., Heine, S., Garner, A., Gullikson, E., Guenther, M., Leitz, C., … Schulz, N. (2020). A small satellite version of a soft x-ray polarimeter. In Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray (Vol. 11444). Virtual: SPIE. https://doi.org/10.1117/12.2562811' chicago: 'Marshall, Herman L., Sarah Heine, Alan Garner, Eric Gullikson, Moritz Guenther, Christopher Leitz, Rebecca Masterson, et al. “A Small Satellite Version of a Soft X-Ray Polarimeter.” In Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, Vol. 11444. SPIE, 2020. https://doi.org/10.1117/12.2562811.' ieee: 'H. L. Marshall et al., “A small satellite version of a soft x-ray polarimeter,” in Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, Virtual, 2020, vol. 11444.' ista: 'Marshall HL, Heine S, Garner A, Gullikson E, Guenther M, Leitz C, Masterson R, Miller E, Zhang W, Boissay Malaquin R, Caiazzo I, Chakrabarty D, Davidson R, Gallo L, Heilmann RK, Heyl J, Kara E, Marscher A, Schulz N. 2020. A small satellite version of a soft x-ray polarimeter. Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray. Astronomical Telescopes + Instrumentation vol. 11444, 114442Y.' mla: 'Marshall, Herman L., et al. “A Small Satellite Version of a Soft X-Ray Polarimeter.” Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, vol. 11444, 114442Y, SPIE, 2020, doi:10.1117/12.2562811.' short: 'H.L. Marshall, S. Heine, A. Garner, E. Gullikson, M. Guenther, C. Leitz, R. Masterson, E. Miller, W. Zhang, R. Boissay Malaquin, I. Caiazzo, D. Chakrabarty, R. Davidson, L. Gallo, R.K. Heilmann, J. Heyl, E. Kara, A. Marscher, N. Schulz, in:, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, SPIE, 2020.' conference: end_date: 2020-12-18 location: Virtual name: Astronomical Telescopes + Instrumentation start_date: 2020-12-14 date_created: 2024-03-26T10:36:20Z date_published: 2020-12-13T00:00:00Z date_updated: 2024-04-08T06:58:50Z day: '13' doi: 10.1117/12.2562811 extern: '1' external_id: arxiv: - '2012.02829' intvolume: ' 11444' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2012.02829 month: '12' oa: 1 oa_version: Preprint publication: 'Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray' publication_identifier: eissn: - 1996-756X isbn: - 978-151063675-0 publication_status: published publisher: SPIE quality_controlled: '1' scopus_import: '1' status: public title: A small satellite version of a soft x-ray polarimeter type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 11444 year: '2020' ... --- _id: '15229' abstract: - lang: eng text: 'We propose a high-time-resolution, high-spectral-resolution X-ray telescope that uses transition-edge sensors (TES) as detectors and collector optics to direct the X-rays onto the focal plane, providing a large effective area in a small satellite. The key science driver of the instrument is to study neutron stars and accreting black holes. The proposed instrument is built upon two technologies that are already at high TRL: TES X-ray detectors and collector optics.' article_number: 114442A article_processing_charge: No author: - first_name: Jeremy full_name: Heyl, Jeremy last_name: Heyl - first_name: Ilaria full_name: Caiazzo, Ilaria id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d last_name: Caiazzo orcid: 0000-0002-4770-5388 - first_name: Sarah full_name: Gallagher, Sarah last_name: Gallagher - first_name: Kelsey full_name: Hoffman, Kelsey last_name: Hoffman - first_name: Samar full_name: Safi-Harb, Samar last_name: Safi-Harb citation: ama: 'Heyl J, Caiazzo I, Gallagher S, Hoffman K, Safi-Harb S. The Colibrì high-resolution x-ray telescope. In: Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray. Vol 11444. SPIE; 2020. doi:10.1117/12.2562625' apa: 'Heyl, J., Caiazzo, I., Gallagher, S., Hoffman, K., & Safi-Harb, S. (2020). The Colibrì high-resolution x-ray telescope. In Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray (Vol. 11444). Virtual: SPIE. https://doi.org/10.1117/12.2562625' chicago: 'Heyl, Jeremy, Ilaria Caiazzo, Sarah Gallagher, Kelsey Hoffman, and Samar Safi-Harb. “The Colibrì High-Resolution x-Ray Telescope.” In Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, Vol. 11444. SPIE, 2020. https://doi.org/10.1117/12.2562625.' ieee: 'J. Heyl, I. Caiazzo, S. Gallagher, K. Hoffman, and S. Safi-Harb, “The Colibrì high-resolution x-ray telescope,” in Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, Virtual, 2020, vol. 11444.' ista: 'Heyl J, Caiazzo I, Gallagher S, Hoffman K, Safi-Harb S. 2020. The Colibrì high-resolution x-ray telescope. Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray. Astronomical Telescopes + Instrumentation vol. 11444, 114442A.' mla: 'Heyl, Jeremy, et al. “The Colibrì High-Resolution x-Ray Telescope.” Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, vol. 11444, 114442A, SPIE, 2020, doi:10.1117/12.2562625.' short: 'J. Heyl, I. Caiazzo, S. Gallagher, K. Hoffman, S. Safi-Harb, in:, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, SPIE, 2020.' conference: end_date: 2020-12-18 location: Virtual name: Astronomical Telescopes + Instrumentation start_date: 2020-12-14 date_created: 2024-03-26T10:36:40Z date_published: 2020-12-13T00:00:00Z date_updated: 2024-04-08T06:59:43Z day: '13' doi: 10.1117/12.2562625 extern: '1' intvolume: ' 11444' language: - iso: eng month: '12' oa_version: None publication: 'Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray' publication_identifier: eissn: - 1996-756X isbn: - 978-151063675-0 publication_status: published publisher: SPIE quality_controlled: '1' scopus_import: '1' status: public title: The Colibrì high-resolution x-ray telescope type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 11444 year: '2020' ... --- _id: '15286' article_processing_charge: No article_type: original author: - first_name: Florian full_name: Fäßler, Florian id: 404F5528-F248-11E8-B48F-1D18A9856A87 last_name: Fäßler orcid: 0000-0001-7149-769X - first_name: Georgi A full_name: Dimchev, Georgi A id: 38C393BE-F248-11E8-B48F-1D18A9856A87 last_name: Dimchev orcid: 0000-0001-8370-6161 - first_name: Victor-Valentin full_name: Hodirnau, Victor-Valentin id: 3661B498-F248-11E8-B48F-1D18A9856A87 last_name: Hodirnau orcid: 0000-0003-3904-947X - first_name: Bettina full_name: Zens, Bettina id: 45FD126C-F248-11E8-B48F-1D18A9856A87 last_name: Zens orcid: 0000-0002-9561-1239 - first_name: Christoph full_name: Möhl, Christoph last_name: Möhl - first_name: Frank full_name: Bradke, Frank last_name: Bradke - first_name: Florian KM full_name: Schur, Florian KM id: 48AD8942-F248-11E8-B48F-1D18A9856A87 last_name: Schur orcid: 0000-0003-4790-8078 citation: ama: Fäßler F, Dimchev GA, Hodirnau V-V, et al. Cryo-electron tomography workflows for quantitative analysis of actin networks involved in cell migration. Microscopy and Microanalysis. 2020;26(S2):2518-2519. doi:10.1017/s1431927620021881 apa: Fäßler, F., Dimchev, G. A., Hodirnau, V.-V., Zens, B., Möhl, C., Bradke, F., & Schur, F. K. (2020). Cryo-electron tomography workflows for quantitative analysis of actin networks involved in cell migration. Microscopy and Microanalysis. Oxford University Press. https://doi.org/10.1017/s1431927620021881 chicago: Fäßler, Florian, Georgi A Dimchev, Victor-Valentin Hodirnau, Bettina Zens, Christoph Möhl, Frank Bradke, and Florian KM Schur. “Cryo-Electron Tomography Workflows for Quantitative Analysis of Actin Networks Involved in Cell Migration.” Microscopy and Microanalysis. Oxford University Press, 2020. https://doi.org/10.1017/s1431927620021881. ieee: F. Fäßler et al., “Cryo-electron tomography workflows for quantitative analysis of actin networks involved in cell migration,” Microscopy and Microanalysis, vol. 26, no. S2. Oxford University Press, pp. 2518–2519, 2020. ista: Fäßler F, Dimchev GA, Hodirnau V-V, Zens B, Möhl C, Bradke F, Schur FK. 2020. Cryo-electron tomography workflows for quantitative analysis of actin networks involved in cell migration. Microscopy and Microanalysis. 26(S2), 2518–2519. mla: Fäßler, Florian, et al. “Cryo-Electron Tomography Workflows for Quantitative Analysis of Actin Networks Involved in Cell Migration.” Microscopy and Microanalysis, vol. 26, no. S2, Oxford University Press, 2020, pp. 2518–19, doi:10.1017/s1431927620021881. short: F. Fäßler, G.A. Dimchev, V.-V. Hodirnau, B. Zens, C. Möhl, F. Bradke, F.K. Schur, Microscopy and Microanalysis 26 (2020) 2518–2519. corr_author: '1' date_created: 2024-04-03T09:40:11Z date_published: 2020-08-01T00:00:00Z date_updated: 2024-10-09T21:08:43Z day: '01' department: - _id: FlSc - _id: EM-Fac doi: 10.1017/s1431927620021881 intvolume: ' 26' issue: S2 keyword: - Instrumentation language: - iso: eng month: '08' oa_version: None page: 2518-2519 publication: Microscopy and Microanalysis publication_identifier: eissn: - 1435-8115 issn: - 1431-9276 publication_status: published publisher: Oxford University Press quality_controlled: '1' status: public title: Cryo-electron tomography workflows for quantitative analysis of actin networks involved in cell migration type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 26 year: '2020' ... --- _id: '10556' abstract: - lang: eng text: In this paper, we present the first Asynchronous Distributed Key Generation (ADKG) algorithm which is also the first distributed key generation algorithm that can generate cryptographic keys with a dual (f,2f+1)-threshold (where f is the number of faulty parties). As a result, using our ADKG we remove the trusted setup assumption that the most scalable consensus algorithms make. In order to create a DKG with a dual (f,2f+1)- threshold we first answer in the affirmative the open question posed by Cachin et al. [7] on how to create an Asynchronous Verifiable Secret Sharing (AVSS) protocol with a reconstruction threshold of f+1Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security. Association for Computing Machinery; 2020:1751–1767. doi:10.1145/3372297.3423364' apa: 'Kokoris Kogias, E., Malkhi, D., & Spiegelman, A. (2020). Asynchronous distributed key generation for computationally-secure randomness, consensus, and threshold signatures. In Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security (pp. 1751–1767). Virtual, United States: Association for Computing Machinery. https://doi.org/10.1145/3372297.3423364' chicago: Kokoris Kogias, Eleftherios, Dahlia Malkhi, and Alexander Spiegelman. “Asynchronous Distributed Key Generation for Computationally-Secure Randomness, Consensus, and Threshold Signatures.” In Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security, 1751–1767. Association for Computing Machinery, 2020. https://doi.org/10.1145/3372297.3423364. ieee: E. Kokoris Kogias, D. Malkhi, and A. Spiegelman, “Asynchronous distributed key generation for computationally-secure randomness, consensus, and threshold signatures,” in Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security, Virtual, United States, 2020, pp. 1751–1767. ista: 'Kokoris Kogias E, Malkhi D, Spiegelman A. 2020. Asynchronous distributed key generation for computationally-secure randomness, consensus, and threshold signatures. Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security. CCS: Conference on Computer and Communications Security, 1751–1767.' mla: Kokoris Kogias, Eleftherios, et al. “Asynchronous Distributed Key Generation for Computationally-Secure Randomness, Consensus, and Threshold Signatures.” Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security, Association for Computing Machinery, 2020, pp. 1751–1767, doi:10.1145/3372297.3423364. short: E. Kokoris Kogias, D. Malkhi, A. Spiegelman, in:, Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security, Association for Computing Machinery, 2020, pp. 1751–1767. conference: end_date: 2020-11-13 location: Virtual, United States name: 'CCS: Conference on Computer and Communications Security' start_date: 2020-11-09 date_created: 2021-12-16T13:23:27Z date_published: 2020-10-30T00:00:00Z date_updated: 2025-07-10T11:49:52Z day: '30' department: - _id: ElKo doi: 10.1145/3372297.3423364 external_id: isi: - '000768470400104' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://eprint.iacr.org/2019/1015 month: '10' oa: 1 oa_version: Preprint page: 1751–1767 publication: Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security publication_identifier: isbn: - 978-1-4503-7089-9 publication_status: published publisher: Association for Computing Machinery quality_controlled: '1' scopus_import: '1' status: public title: Asynchronous distributed key generation for computationally-secure randomness, consensus, and threshold signatures type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '10557' abstract: - lang: eng text: Data storage and retrieval systems, methods, and computer-readable media utilize a cryptographically verifiable data structure that facilitates verification of a transaction in a decentralized peer-to-peer environment using multi-hop backwards and forwards links. Backward links are cryptographic hashes of past records. Forward links are cryptographic signatures of future records that are added retroactively to records once the target block has been appended to the data structure. applicant: - Ecole Polytechnique Federale de Lausanne application_date: 2017-06-09 article_processing_charge: No author: - first_name: Bryan full_name: Ford, Bryan last_name: Ford - first_name: Linus full_name: Gasse, Linus last_name: Gasse - first_name: Eleftherios full_name: Kokoris Kogias, Eleftherios id: f5983044-d7ef-11ea-ac6d-fd1430a26d30 last_name: Kokoris Kogias - first_name: Philipp full_name: Jovanovic, Philipp last_name: Jovanovic citation: ama: Ford B, Gasse L, Kokoris Kogias E, Jovanovic P. Cryptographically verifiable data structure having multi-hop forward and backwards links and associated systems and methods. 2020. apa: Ford, B., Gasse, L., Kokoris Kogias, E., & Jovanovic, P. (2020). Cryptographically verifiable data structure having multi-hop forward and backwards links and associated systems and methods. chicago: Ford, Bryan, Linus Gasse, Eleftherios Kokoris Kogias, and Philipp Jovanovic. “Cryptographically Verifiable Data Structure Having Multi-Hop Forward and Backwards Links and Associated Systems and Methods,” 2020. ieee: B. Ford, L. Gasse, E. Kokoris Kogias, and P. Jovanovic, “Cryptographically verifiable data structure having multi-hop forward and backwards links and associated systems and methods.” 2020. ista: Ford B, Gasse L, Kokoris Kogias E, Jovanovic P. 2020. Cryptographically verifiable data structure having multi-hop forward and backwards links and associated systems and methods. mla: Ford, Bryan, et al. Cryptographically Verifiable Data Structure Having Multi-Hop Forward and Backwards Links and Associated Systems and Methods. 2020. short: B. Ford, L. Gasse, E. Kokoris Kogias, P. Jovanovic, (2020). date_created: 2021-12-16T13:28:59Z date_published: 2020-03-03T00:00:00Z date_updated: 2021-12-21T10:04:50Z day: '03' department: - _id: ElKo extern: '1' ipc: ' H04L9/3247 ; G06Q20/29 ; G06Q20/382 ; H04L9/3236' ipn: '10581613' main_file_link: - open_access: '1' url: https://patents.google.com/patent/US10581613B2/en month: '03' oa: 1 oa_version: Published Version publication_date: 2020-03-03 related_material: link: - relation: earlier_version url: https://patents.google.com/patent/US20180359096A1/en status: public title: Cryptographically verifiable data structure having multi-hop forward and backwards links and associated systems and methods type: patent user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2020' ... --- _id: '10618' abstract: - lang: eng text: Magnetism typically arises from the joint effect of Fermi statistics and repulsive Coulomb interactions, which favours ground states with non-zero electron spin. As a result, controlling spin magnetism with electric fields—a longstanding technological goal in spintronics and multiferroics1,2—can be achieved only indirectly. Here we experimentally demonstrate direct electric-field control of magnetic states in an orbital Chern insulator3,4,5,6, a magnetic system in which non-trivial band topology favours long-range order of orbital angular momentum but the spins are thought to remain disordered7,8,9,10,11,12,13,14. We use van der Waals heterostructures consisting of a graphene monolayer rotationally faulted with respect to a Bernal-stacked bilayer to realize narrow and topologically non-trivial valley-projected moiré minibands15,16,17. At fillings of one and three electrons per moiré unit cell within these bands, we observe quantized anomalous Hall effects18 with transverse resistance approximately equal to h/2e2 (where h is Planck’s constant and e is the charge on the electron), which is indicative of spontaneous polarization of the system into a single-valley-projected band with a Chern number equal to two. At a filling of three electrons per moiré unit cell, we find that the sign of the quantum anomalous Hall effect can be reversed via field-effect control of the chemical potential; moreover, this transition is hysteretic, which we use to demonstrate non-volatile electric-field-induced reversal of the magnetic state. A theoretical analysis19 indicates that the effect arises from the topological edge states, which drive a change in sign of the magnetization and thus a reversal in the favoured magnetic state. Voltage control of magnetic states can be used to electrically pattern non-volatile magnetic-domain structures hosting chiral edge states, with applications ranging from reconfigurable microwave circuit elements to ultralow-power magnetic memories. acknowledgement: We acknowledge discussions with J. Checkelsky, S. Chen, C. Dean, M. Yankowitz, D. Reilly, I. Sodemann and M. Zaletel. Work at UCSB was primarily supported by the ARO under MURI W911NF-16-1-0361. Measurements of twisted bilayer graphene (Extended Data Fig. 8) and measurements at elevated temperatures (Extended Data Fig. 3) were supported by a SEED grant and made use of shared facilities of the UCSB MRSEC (NSF DMR 1720256), a member of the Materials Research Facilities Network (www.mrfn.org). A.F.Y. acknowledges the support of the David and Lucille Packard Foundation under award 2016-65145. A.H.M. and J.Z. were supported by the National Science Foundation through the Center for Dynamics and Control of Materials, an NSF MRSEC under Cooperative Agreement number DMR-1720595, and by the Welch Foundation under grant TBF1473. C.L.T. acknowledges support from the Hertz Foundation and from the National Science Foundation Graduate Research Fellowship Program under grant 1650114. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan, Grant Number JPMXP0112101001, JSPS KAKENHI grant numbers JP20H00354 and the CREST(JPMJCR15F3), JST. article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: J. full_name: Zhu, J. last_name: Zhu - first_name: M. A. full_name: Kumar, M. A. last_name: Kumar - first_name: Y. full_name: Zhang, Y. last_name: Zhang - first_name: F. full_name: Yang, F. last_name: Yang - first_name: C. L. full_name: Tschirhart, C. L. last_name: Tschirhart - first_name: M. full_name: Serlin, M. last_name: Serlin - first_name: K. full_name: Watanabe, K. last_name: Watanabe - first_name: T. full_name: Taniguchi, T. last_name: Taniguchi - first_name: A. H. full_name: MacDonald, A. H. last_name: MacDonald - first_name: A. F. full_name: Young, A. F. last_name: Young citation: ama: Polshyn H, Zhu J, Kumar MA, et al. Electrical switching of magnetic order in an orbital Chern insulator. Nature. 2020;588(7836):66-70. doi:10.1038/s41586-020-2963-8 apa: Polshyn, H., Zhu, J., Kumar, M. A., Zhang, Y., Yang, F., Tschirhart, C. L., … Young, A. F. (2020). Electrical switching of magnetic order in an orbital Chern insulator. Nature. Springer Nature. https://doi.org/10.1038/s41586-020-2963-8 chicago: Polshyn, Hryhoriy, J. Zhu, M. A. Kumar, Y. Zhang, F. Yang, C. L. Tschirhart, M. Serlin, et al. “Electrical Switching of Magnetic Order in an Orbital Chern Insulator.” Nature. Springer Nature, 2020. https://doi.org/10.1038/s41586-020-2963-8. ieee: H. Polshyn et al., “Electrical switching of magnetic order in an orbital Chern insulator,” Nature, vol. 588, no. 7836. Springer Nature, pp. 66–70, 2020. ista: Polshyn H, Zhu J, Kumar MA, Zhang Y, Yang F, Tschirhart CL, Serlin M, Watanabe K, Taniguchi T, MacDonald AH, Young AF. 2020. Electrical switching of magnetic order in an orbital Chern insulator. Nature. 588(7836), 66–70. mla: Polshyn, Hryhoriy, et al. “Electrical Switching of Magnetic Order in an Orbital Chern Insulator.” Nature, vol. 588, no. 7836, Springer Nature, 2020, pp. 66–70, doi:10.1038/s41586-020-2963-8. short: H. Polshyn, J. Zhu, M.A. Kumar, Y. Zhang, F. Yang, C.L. Tschirhart, M. Serlin, K. Watanabe, T. Taniguchi, A.H. MacDonald, A.F. Young, Nature 588 (2020) 66–70. date_created: 2022-01-13T14:12:17Z date_published: 2020-11-23T00:00:00Z date_updated: 2022-01-13T14:21:04Z day: '23' doi: 10.1038/s41586-020-2963-8 extern: '1' external_id: arxiv: - '2004.11353' pmid: - '33230333' intvolume: ' 588' issue: '7836' keyword: - multidisciplinary language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2004.11353 month: '11' oa: 1 oa_version: Preprint page: 66-70 pmid: 1 publication: Nature publication_identifier: eissn: - 1476-4687 issn: - 0028-0836 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Electrical switching of magnetic order in an orbital Chern insulator type: journal_article user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 588 year: '2020' ... --- _id: '10650' abstract: - lang: eng text: The understanding of material systems with strong electron-electron interactions is the central problem in modern condensed matter physics. Despite this, the essential physics of many of these materials is still not understood and we have no overall perspective on their properties. Moreover, we have very little ability to make predictions in this class of systems. In this manuscript we share our personal views of what the major open problems are in correlated electron systems and we discuss some possible routes to make progress in this rich and fascinating field. This manuscript is the result of the vigorous discussions and deliberations that took place at Johns Hopkins University during a three-day workshop January 27, 28, and 29, 2020 that brought together six senior scientists and 46 more junior scientists. Our hope, is that the topics we have presented will provide inspiration for others working in this field and motivation for the idea that significant progress can be made on very hard problems if we focus our collective energies. acknowledgement: "We thank NSF CMP program for suggestions regarding the topic and general structure of the workshop. This project was supported by the NSF DMR-2002329 and The Gordon and Betty Moore Foundation (GBMF) EPiQS initiative. We would like to sincerely thank A. Kapitulnik, A. J. Leggett, M.B. Maple, T.M. McQueen, M. Norman, P. S. Riseborough, and G. A. Sawatzky for their lectures at the workshop and advice on the writing of this manuscript. We would also like to thank G. Blumberg, C. Broholm, S. Crooker, N. Drichko, and A. Patel for helpful consultation on topics discussed\r\nherein. A number of individuals also had independent support: (AA, EH; GBMF-4305), (IMH; GBMF-9071), (HJC; NHMFL is supported by the NSF DMR-1644779 and the state of Florida), (YH, AZ; Miller Institute for Basic Research in Science), (YC; US DOE-BES DEAC02-06CH11357), (AS; Spallation Neutron Source, a DOE Office of Science User Facility operated by ORNL), (SAAG; ARO-W911NF-18-1-0290, NSF DMR-1455233), (YW; DOE-BES DE-SC0019331, GBMF-4532)." article_processing_charge: No arxiv: 1 author: - first_name: A full_name: Alexandradinata, A last_name: Alexandradinata - first_name: N.P. full_name: Armitage, N.P. last_name: Armitage - first_name: Andrey full_name: Baydin, Andrey last_name: Baydin - first_name: Wenli full_name: Bi, Wenli last_name: Bi - first_name: Yue full_name: Cao, Yue last_name: Cao - first_name: Hitesh J. full_name: Changlani, Hitesh J. last_name: Changlani - first_name: Eli full_name: Chertkov, Eli last_name: Chertkov - first_name: Eduardo H. full_name: da Silva Neto, Eduardo H. last_name: da Silva Neto - first_name: Luca full_name: Delacretaz, Luca last_name: Delacretaz - first_name: Ismail full_name: El Baggari, Ismail last_name: El Baggari - first_name: G.M. full_name: Ferguson, G.M. last_name: Ferguson - first_name: William J. full_name: Gannon, William J. last_name: Gannon - first_name: Sayed Ali Akbar full_name: Ghorashi, Sayed Ali Akbar last_name: Ghorashi - first_name: Berit H. full_name: Goodge, Berit H. last_name: Goodge - first_name: Olga full_name: Goulko, Olga last_name: Goulko - first_name: G. full_name: Grissonnache, G. last_name: Grissonnache - first_name: Alannah full_name: Hallas, Alannah last_name: Hallas - first_name: Ian M. full_name: Hayes, Ian M. last_name: Hayes - first_name: Yu full_name: He, Yu last_name: He - first_name: Edwin W. full_name: Huang, Edwin W. last_name: Huang - first_name: Anshu full_name: Kogar, Anshu last_name: Kogar - first_name: Divine full_name: Kumah, Divine last_name: Kumah - first_name: Jong Yeon full_name: Lee, Jong Yeon last_name: Lee - first_name: A. full_name: Legros, A. last_name: Legros - first_name: Fahad full_name: Mahmood, Fahad last_name: Mahmood - first_name: Yulia full_name: Maximenko, Yulia last_name: Maximenko - first_name: Nick full_name: Pellatz, Nick last_name: Pellatz - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Tarapada full_name: Sarkar, Tarapada last_name: Sarkar - first_name: Allen full_name: Scheie, Allen last_name: Scheie - first_name: Kyle L. full_name: Seyler, Kyle L. last_name: Seyler - first_name: Zhenzhong full_name: Shi, Zhenzhong last_name: Shi - first_name: Brian full_name: Skinner, Brian last_name: Skinner - first_name: Lucia full_name: Steinke, Lucia last_name: Steinke - first_name: K. full_name: Thirunavukkuarasu, K. last_name: Thirunavukkuarasu - first_name: Thaís Victa full_name: Trevisan, Thaís Victa last_name: Trevisan - first_name: Michael full_name: Vogl, Michael last_name: Vogl - first_name: Pavel A. full_name: Volkov, Pavel A. last_name: Volkov - first_name: Yao full_name: Wang, Yao last_name: Wang - first_name: Yishu full_name: Wang, Yishu last_name: Wang - first_name: Di full_name: Wei, Di last_name: Wei - first_name: Kaya full_name: Wei, Kaya last_name: Wei - first_name: Shuolong full_name: Yang, Shuolong last_name: Yang - first_name: Xian full_name: Zhang, Xian last_name: Zhang - first_name: Ya-Hui full_name: Zhang, Ya-Hui last_name: Zhang - first_name: Liuyan full_name: Zhao, Liuyan last_name: Zhao - first_name: Alfred full_name: Zong, Alfred last_name: Zong citation: ama: Alexandradinata A, Armitage NP, Baydin A, et al. The future of the correlated electron problem. arXiv. apa: Alexandradinata, A., Armitage, N. P., Baydin, A., Bi, W., Cao, Y., Changlani, H. J., … Zong, A. (n.d.). The future of the correlated electron problem. arXiv. chicago: Alexandradinata, A, N.P. Armitage, Andrey Baydin, Wenli Bi, Yue Cao, Hitesh J. Changlani, Eli Chertkov, et al. “The Future of the Correlated Electron Problem.” ArXiv, n.d. ieee: A. Alexandradinata et al., “The future of the correlated electron problem,” arXiv. . ista: Alexandradinata A, Armitage NP, Baydin A, Bi W, Cao Y, Changlani HJ, Chertkov E, da Silva Neto EH, Delacretaz L, El Baggari I, Ferguson GM, Gannon WJ, Ghorashi SAA, Goodge BH, Goulko O, Grissonnache G, Hallas A, Hayes IM, He Y, Huang EW, Kogar A, Kumah D, Lee JY, Legros A, Mahmood F, Maximenko Y, Pellatz N, Polshyn H, Sarkar T, Scheie A, Seyler KL, Shi Z, Skinner B, Steinke L, Thirunavukkuarasu K, Trevisan TV, Vogl M, Volkov PA, Wang Y, Wang Y, Wei D, Wei K, Yang S, Zhang X, Zhang Y-H, Zhao L, Zong A. The future of the correlated electron problem. arXiv, . mla: Alexandradinata, A., et al. “The Future of the Correlated Electron Problem.” ArXiv. short: A. Alexandradinata, N.P. Armitage, A. Baydin, W. Bi, Y. Cao, H.J. Changlani, E. Chertkov, E.H. da Silva Neto, L. Delacretaz, I. El Baggari, G.M. Ferguson, W.J. Gannon, S.A.A. Ghorashi, B.H. Goodge, O. Goulko, G. Grissonnache, A. Hallas, I.M. Hayes, Y. He, E.W. Huang, A. Kogar, D. Kumah, J.Y. Lee, A. Legros, F. Mahmood, Y. Maximenko, N. Pellatz, H. Polshyn, T. Sarkar, A. Scheie, K.L. Seyler, Z. Shi, B. Skinner, L. Steinke, K. Thirunavukkuarasu, T.V. Trevisan, M. Vogl, P.A. Volkov, Y. Wang, Y. Wang, D. Wei, K. Wei, S. Yang, X. Zhang, Y.-H. Zhang, L. Zhao, A. Zong, ArXiv (n.d.). date_created: 2022-01-20T10:55:36Z date_published: 2020-10-01T00:00:00Z date_updated: 2022-01-24T08:05:51Z day: '01' extern: '1' external_id: arxiv: - '2010.00584' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2010.00584 month: '10' oa: 1 oa_version: Preprint page: '55' publication: arXiv publication_status: submitted status: public title: The future of the correlated electron problem type: preprint user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2020' ... --- _id: '10672' abstract: - lang: eng text: The family of feedback alignment (FA) algorithms aims to provide a more biologically motivated alternative to backpropagation (BP), by substituting the computations that are unrealistic to be implemented in physical brains. While FA algorithms have been shown to work well in practice, there is a lack of rigorous theory proofing their learning capabilities. Here we introduce the first feedback alignment algorithm with provable learning guarantees. In contrast to existing work, we do not require any assumption about the size or depth of the network except that it has a single output neuron, i.e., such as for binary classification tasks. We show that our FA algorithm can deliver its theoretical promises in practice, surpassing the learning performance of existing FA methods and matching backpropagation in binary classification tasks. Finally, we demonstrate the limits of our FA variant when the number of output neurons grows beyond a certain quantity. acknowledgement: "This research was supported in part by the Austrian Science Fund (FWF) under grant Z211-N23\r\n(Wittgenstein Award).\r\n" article_processing_charge: No author: - first_name: Mathias full_name: Lechner, Mathias id: 3DC22916-F248-11E8-B48F-1D18A9856A87 last_name: Lechner citation: ama: 'Lechner M. Learning representations for binary-classification without backpropagation. In: 8th International Conference on Learning Representations. ICLR; 2020.' apa: 'Lechner, M. (2020). Learning representations for binary-classification without backpropagation. In 8th International Conference on Learning Representations. Virtual ; Addis Ababa, Ethiopia: ICLR.' chicago: Lechner, Mathias. “Learning Representations for Binary-Classification without Backpropagation.” In 8th International Conference on Learning Representations. ICLR, 2020. ieee: M. Lechner, “Learning representations for binary-classification without backpropagation,” in 8th International Conference on Learning Representations, Virtual ; Addis Ababa, Ethiopia, 2020. ista: 'Lechner M. 2020. Learning representations for binary-classification without backpropagation. 8th International Conference on Learning Representations. ICLR: International Conference on Learning Representations.' mla: Lechner, Mathias. “Learning Representations for Binary-Classification without Backpropagation.” 8th International Conference on Learning Representations, ICLR, 2020. short: M. Lechner, in:, 8th International Conference on Learning Representations, ICLR, 2020. conference: end_date: 2020-05-01 location: Virtual ; Addis Ababa, Ethiopia name: 'ICLR: International Conference on Learning Representations' start_date: 2020-04-26 corr_author: '1' date_created: 2022-01-25T15:50:00Z date_published: 2020-03-11T00:00:00Z date_updated: 2025-04-15T06:25:56Z day: '11' ddc: - '000' department: - _id: GradSch - _id: ToHe file: - access_level: open_access checksum: ea13d42dd4541ddb239b6a75821fd6c9 content_type: application/pdf creator: mlechner date_created: 2022-01-26T07:35:17Z date_updated: 2022-01-26T07:35:17Z file_id: '10677' file_name: iclr_2020.pdf file_size: 249431 relation: main_file success: 1 file_date_updated: 2022-01-26T07:35:17Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-nd/3.0/ main_file_link: - open_access: '1' url: https://openreview.net/forum?id=Bke61krFvS month: '03' oa: 1 oa_version: Published Version project: - _id: 25F42A32-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z211 name: Formal methods for the design and analysis of complex systems publication: 8th International Conference on Learning Representations publication_status: published publisher: ICLR quality_controlled: '1' scopus_import: '1' status: public title: Learning representations for binary-classification without backpropagation tmp: image: /images/cc_by_nc_nd.png legal_code_url: https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode name: Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) short: CC BY-NC-ND (3.0) type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '10673' abstract: - lang: eng text: We propose a neural information processing system obtained by re-purposing the function of a biological neural circuit model to govern simulated and real-world control tasks. Inspired by the structure of the nervous system of the soil-worm, C. elegans, we introduce ordinary neural circuits (ONCs), defined as the model of biological neural circuits reparameterized for the control of alternative tasks. We first demonstrate that ONCs realize networks with higher maximum flow compared to arbitrary wired networks. We then learn instances of ONCs to control a series of robotic tasks, including the autonomous parking of a real-world rover robot. For reconfiguration of the purpose of the neural circuit, we adopt a search-based optimization algorithm. Ordinary neural circuits perform on par and, in some cases, significantly surpass the performance of contemporary deep learning models. ONC networks are compact, 77% sparser than their counterpart neural controllers, and their neural dynamics are fully interpretable at the cell-level. acknowledgement: "RH and RG are partially supported by Horizon-2020 ECSEL Project grant No. 783163 (iDev40), Productive 4.0, and ATBMBFW CPS-IoT Ecosystem. ML was supported in part by the Austrian Science Fund (FWF) under grant Z211-N23\r\n(Wittgenstein Award). AA is supported by the National Science Foundation (NSF) Graduate Research Fellowship\r\nProgram. RH and DR are partially supported by The Boeing Company and JP Morgan Chase. This research work is\r\npartially drawn from the PhD dissertation of RH.\r\n" alternative_title: - PMLR article_processing_charge: No author: - first_name: Ramin full_name: Hasani, Ramin last_name: Hasani - first_name: Mathias full_name: Lechner, Mathias id: 3DC22916-F248-11E8-B48F-1D18A9856A87 last_name: Lechner - first_name: Alexander full_name: Amini, Alexander last_name: Amini - first_name: Daniela full_name: Rus, Daniela last_name: Rus - first_name: Radu full_name: Grosu, Radu last_name: Grosu citation: ama: 'Hasani R, Lechner M, Amini A, Rus D, Grosu R. A natural lottery ticket winner: Reinforcement learning with ordinary neural circuits. In: Proceedings of the 37th International Conference on Machine Learning. PMLR. ; 2020:4082-4093.' apa: 'Hasani, R., Lechner, M., Amini, A., Rus, D., & Grosu, R. (2020). A natural lottery ticket winner: Reinforcement learning with ordinary neural circuits. In Proceedings of the 37th International Conference on Machine Learning (pp. 4082–4093). Virtual.' chicago: 'Hasani, Ramin, Mathias Lechner, Alexander Amini, Daniela Rus, and Radu Grosu. “A Natural Lottery Ticket Winner: Reinforcement Learning with Ordinary Neural Circuits.” In Proceedings of the 37th International Conference on Machine Learning, 4082–93. PMLR, 2020.' ieee: 'R. Hasani, M. Lechner, A. Amini, D. Rus, and R. Grosu, “A natural lottery ticket winner: Reinforcement learning with ordinary neural circuits,” in Proceedings of the 37th International Conference on Machine Learning, Virtual, 2020, pp. 4082–4093.' ista: 'Hasani R, Lechner M, Amini A, Rus D, Grosu R. 2020. A natural lottery ticket winner: Reinforcement learning with ordinary neural circuits. Proceedings of the 37th International Conference on Machine Learning. ML: Machine LearningPMLR, PMLR, , 4082–4093.' mla: 'Hasani, Ramin, et al. “A Natural Lottery Ticket Winner: Reinforcement Learning with Ordinary Neural Circuits.” Proceedings of the 37th International Conference on Machine Learning, 2020, pp. 4082–93.' short: R. Hasani, M. Lechner, A. Amini, D. Rus, R. Grosu, in:, Proceedings of the 37th International Conference on Machine Learning, 2020, pp. 4082–4093. conference: end_date: 2020-07-18 location: Virtual name: 'ML: Machine Learning' start_date: 2020-07-12 date_created: 2022-01-25T15:50:34Z date_published: 2020-01-01T00:00:00Z date_updated: 2025-04-15T06:25:56Z ddc: - '000' department: - _id: GradSch - _id: ToHe file: - access_level: open_access checksum: c9a4a29161777fc1a89ef451c040e3b1 content_type: application/pdf creator: cchlebak date_created: 2022-01-26T11:08:51Z date_updated: 2022-01-26T11:08:51Z file_id: '10691' file_name: 2020_PMLR_Hasani.pdf file_size: 2329798 relation: main_file success: 1 file_date_updated: 2022-01-26T11:08:51Z has_accepted_license: '1' language: - iso: eng main_file_link: - open_access: '1' url: http://proceedings.mlr.press/v119/hasani20a.html oa: 1 oa_version: Published Version page: 4082-4093 project: - _id: 25F42A32-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z211 name: Formal methods for the design and analysis of complex systems publication: Proceedings of the 37th International Conference on Machine Learning publication_identifier: issn: - 2640-3498 publication_status: published quality_controlled: '1' scopus_import: '1' series_title: PMLR status: public title: 'A natural lottery ticket winner: Reinforcement learning with ordinary neural circuits' tmp: image: /images/cc_by_nc_nd.png legal_code_url: https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode name: Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) short: CC BY-NC-ND (3.0) type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2020' ... --- _id: '10693' abstract: - lang: eng text: High quality graphene heterostructures host an array of fractional quantum Hall isospin ferromagnets with diverse spin and valley orders. While a variety of phase transitions have been observed, disentangling the isospin phase diagram of these states is hampered by the absence of direct probes of spin and valley order. I will describe nonlocal transport measurements based on launching spin waves from a gate defined lateral heterojunction, performed in ultra-clean Corbino geometry graphene devices. At high magnetic fields, we find that the spin-wave transport signal is detected in all FQH states between ν = 0 and 1; however, between ν = 1 and 2 only odd numerator FQH states show finite nonlocal transport, despite the identical ground state spin polarizations in odd- and even numerator states. The results reveal that the neutral spin-waves are both spin and sublattice polarized making them a sensitive probe of ground state sublattice structure. Armed with this understanding, we use nonlocal transport signal to a magnetic field tuned isospin phase transition, showing that the emergent even denominator state at ν = 1/2 in monolayer graphene is indeed a multicomponent state featuring equal populations on each sublattice. alternative_title: - Bulletin of the American Physical Society article_number: B54. 00007 article_processing_charge: No author: - first_name: Haoxin full_name: Zhou, Haoxin last_name: Zhou - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Takashi full_name: Tanaguchi, Takashi last_name: Tanaguchi - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Andrea full_name: Young, Andrea last_name: Young citation: ama: 'Zhou H, Polshyn H, Tanaguchi T, Watanabe K, Young A. Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order. In: APS March Meeting 2020. Vol 65. American Physical Society; 2020.' apa: 'Zhou, H., Polshyn, H., Tanaguchi, T., Watanabe, K., & Young, A. (2020). Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order. In APS March Meeting 2020 (Vol. 65). Denver, CO, United States: American Physical Society.' chicago: Zhou, Haoxin, Hryhoriy Polshyn, Takashi Tanaguchi, Kenji Watanabe, and Andrea Young. “Sublattice Resolved Spin Wave Transport through Graphene Fractional Quantum Hall States as a Probe of Isospin Order.” In APS March Meeting 2020, Vol. 65. American Physical Society, 2020. ieee: H. Zhou, H. Polshyn, T. Tanaguchi, K. Watanabe, and A. Young, “Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order,” in APS March Meeting 2020, Denver, CO, United States, 2020, vol. 65, no. 1. ista: 'Zhou H, Polshyn H, Tanaguchi T, Watanabe K, Young A. 2020. Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B54. 00007.' mla: Zhou, Haoxin, et al. “Sublattice Resolved Spin Wave Transport through Graphene Fractional Quantum Hall States as a Probe of Isospin Order.” APS March Meeting 2020, vol. 65, no. 1, B54. 00007, American Physical Society, 2020. short: H. Zhou, H. Polshyn, T. Tanaguchi, K. Watanabe, A. Young, in:, APS March Meeting 2020, American Physical Society, 2020. conference: end_date: 2020-03-06 location: Denver, CO, United States name: 'APS: American Physical Society' start_date: 2020-03-02 date_created: 2022-01-27T10:50:10Z date_published: 2020-03-01T00:00:00Z date_updated: 2022-01-27T10:58:38Z day: '01' extern: '1' intvolume: ' 65' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://meetings.aps.org/Meeting/MAR20/Session/B54.7 month: '03' oa: 1 oa_version: Published Version publication: APS March Meeting 2020 publication_identifier: issn: - 0003-0503 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 65 year: '2020' ... --- _id: '10696' abstract: - lang: eng text: We experimentally investigate twisted van der Waals heterostructures of monolayer graphene rotated with respect to a bernal stacked graphene bilayer. We report transport measurements for devices with twist angles between 0.9 and 1.4°. The electric field allows efficient tuning of the width, isolation and the topology of the moiré bands in this system. By comparing magnetoresistance measurements to numerical simulations, we develop an understanding of the band structure. Finally, we observe correlated states at half- and quarter-fillings, which arise when narrow moire sublattice band is isolated by energy gaps from dispersive bands. We investigate the effects of in-plane and out-of-plane magnetic field on these states and discuss the implication for their spin- and valley- polarization. alternative_title: - Bulletin of the American Physical Society article_number: B51.00005 article_processing_charge: No author: - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Jihang full_name: Zhu, Jihang last_name: Zhu - first_name: Manish full_name: Kumar, Manish last_name: Kumar - first_name: Takashi full_name: Taniguchi, Takashi last_name: Taniguchi - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Allan full_name: MacDonald, Allan last_name: MacDonald - first_name: Andrea full_name: Young, Andrea last_name: Young citation: ama: 'Polshyn H, Zhu J, Kumar M, et al. Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. In: APS March Meeting 2020. Vol 65. American Physical Society; 2020.' apa: 'Polshyn, H., Zhu, J., Kumar, M., Taniguchi, T., Watanabe, K., MacDonald, A., & Young, A. (2020). Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. In APS March Meeting 2020 (Vol. 65). Denver, CO, United States: American Physical Society.' chicago: Polshyn, Hryhoriy, Jihang Zhu, Manish Kumar, Takashi Taniguchi, Kenji Watanabe, Allan MacDonald, and Andrea Young. “Correlated States and Tunable Topological Bands in Twisted Monolayer-Bilayer Graphene Heterostructures.” In APS March Meeting 2020, Vol. 65. American Physical Society, 2020. ieee: H. Polshyn et al., “Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures,” in APS March Meeting 2020, Denver, CO, United States, 2020, vol. 65, no. 1. ista: 'Polshyn H, Zhu J, Kumar M, Taniguchi T, Watanabe K, MacDonald A, Young A. 2020. Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B51.00005.' mla: Polshyn, Hryhoriy, et al. “Correlated States and Tunable Topological Bands in Twisted Monolayer-Bilayer Graphene Heterostructures.” APS March Meeting 2020, vol. 65, no. 1, B51.00005, American Physical Society, 2020. short: H. Polshyn, J. Zhu, M. Kumar, T. Taniguchi, K. Watanabe, A. MacDonald, A. Young, in:, APS March Meeting 2020, American Physical Society, 2020. conference: end_date: 2020-03-06 location: Denver, CO, United States name: 'APS: American Physical Society' start_date: 2020-03-02 date_created: 2022-01-28T10:09:19Z date_published: 2020-03-01T00:00:00Z date_updated: 2022-02-08T10:22:08Z day: '01' extern: '1' intvolume: ' 65' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://meetings.aps.org/Meeting/MAR20/Session/B51.5 month: '03' oa: 1 oa_version: Published Version publication: APS March Meeting 2020 publication_identifier: issn: - 0003-0503 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 65 year: '2020' ... --- _id: '10697' abstract: - lang: eng text: We report the observation of a quantized anomalous Hall effect in a moiré heterostructure consisting of twisted bilayer graphene aligned to an encapsulating hBN substrate. The effect occurs at a density of 3 electrons per superlattice unit cell, where we observe magnetic hysteresis and a Hall resistance quantized to within 0.1% of the resistance quantum at temperatures as high as 3K. In this first of 3 talks, I will describe the fabrication procedure for our device as well as basic transport characterization measurements. I will introduce the phenomenology of twisted bilayer graphene and present evidence for hBN alignment as manifested in the hierarchy of symmetry-breaking gaps and anomalous magnetoresistance. acknowledgement: I would like to thank the MURI program, Sloan foundation, AFOSR, and ARO for their generous support of this work. alternative_title: - Bulletin of the American Physical Society article_number: B59.00012 article_processing_charge: No arxiv: 1 author: - first_name: Yuxuan full_name: Zhang, Yuxuan last_name: Zhang - first_name: Marec full_name: Serlin, Marec last_name: Serlin - first_name: Charles full_name: Tschirhart, Charles last_name: Tschirhart - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Jiacheng full_name: Zhu, Jiacheng last_name: Zhu - first_name: Leon full_name: Balents, Leon last_name: Balents - first_name: Martin E. full_name: Huber, Martin E. last_name: Huber - first_name: Takashi full_name: Taniguchi, Takashi last_name: Taniguchi - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Andrea full_name: Young, Andrea last_name: Young citation: ama: 'Zhang Y, Serlin M, Tschirhart C, et al. Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part I: Device fabrication and transport. In: APS March Meeting 2020. Vol 65. American Physical Society; 2020.' apa: 'Zhang, Y., Serlin, M., Tschirhart, C., Polshyn, H., Zhu, J., Balents, L., … Young, A. (2020). Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part I: Device fabrication and transport. In APS March Meeting 2020 (Vol. 65). Denver, CO, United States: American Physical Society.' chicago: 'Zhang, Yuxuan, Marec Serlin, Charles Tschirhart, Hryhoriy Polshyn, Jiacheng Zhu, Leon Balents, Martin E. Huber, Takashi Taniguchi, Kenji Watanabe, and Andrea Young. “Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part I: Device Fabrication and Transport.” In APS March Meeting 2020, Vol. 65. American Physical Society, 2020.' ieee: 'Y. Zhang et al., “Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part I: Device fabrication and transport,” in APS March Meeting 2020, Denver, CO, United States, 2020, vol. 65, no. 1.' ista: 'Zhang Y, Serlin M, Tschirhart C, Polshyn H, Zhu J, Balents L, Huber ME, Taniguchi T, Watanabe K, Young A. 2020. Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part I: Device fabrication and transport. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B59.00012.' mla: 'Zhang, Yuxuan, et al. “Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part I: Device Fabrication and Transport.” APS March Meeting 2020, vol. 65, no. 1, B59.00012, American Physical Society, 2020.' short: Y. Zhang, M. Serlin, C. Tschirhart, H. Polshyn, J. Zhu, L. Balents, M.E. Huber, T. Taniguchi, K. Watanabe, A. Young, in:, APS March Meeting 2020, American Physical Society, 2020. conference: end_date: 2020-03-06 location: Denver, CO, United States name: 'APS: American Physical Society' start_date: 2020-03-02 date_created: 2022-01-28T10:28:35Z date_published: 2020-03-01T00:00:00Z date_updated: 2023-02-21T15:57:52Z day: '01' extern: '1' external_id: arxiv: - '1907.00261' intvolume: ' 65' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://meetings.aps.org/Meeting/MAR20/Session/B59.12 month: '03' oa: 1 oa_version: Published Version publication: APS March Meeting 2020 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '10619' relation: other status: public status: public title: 'Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part I: Device fabrication and transport' type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 65 year: '2020' ... --- _id: '10698' abstract: - lang: eng text: This is the second of three talks describing the observation and characterization of a ferromagnetic moiré heterostructure based on twisted bilayer graphene aligned to hexagonal boron nitride. I will compare the qualitative and quantitative features of this observed quantum anomalous Hall state to traditional systems engineered from thin film (Bi,Sb)2Te3 topological insulators. In particular, we find that the measured electronic energy gap of ~30K is several times higher than the Curie temperature, consistent with a lack of disorder associated with magnetic dopants. In this system, the quantization arises from spontaneous ferromagnetic polarization into a single spin and valley moiré subband, which is topological despite the lack of spin orbit coupling. I will also discuss the observation of current induced switching, which allows the magnetic state of the heterostructure to be controllably reversed with currents as small as a few nanoamperes. acknowledgement: I would like to thank the MURI Program, AFOSR, Sloan Foundation, and the ARO for their generous support of this work. alternative_title: - Bulletin of the American Physical Society article_number: B59.00011 article_processing_charge: No arxiv: 1 author: - first_name: Marec full_name: Serlin, Marec last_name: Serlin - first_name: Charles full_name: Tschirhart, Charles last_name: Tschirhart - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Yuxuan full_name: Zhang, Yuxuan last_name: Zhang - first_name: Jiacheng full_name: Zhu, Jiacheng last_name: Zhu - first_name: Martin E. full_name: Huber, Martin E. last_name: Huber - first_name: Leon full_name: Balents, Leon last_name: Balents - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Takashi full_name: Tanaguchi, Takashi last_name: Tanaguchi - first_name: Andrea full_name: Young, Andrea last_name: Young citation: ama: 'Serlin M, Tschirhart C, Polshyn H, et al. Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part II: Temperature dependence and current switching. In: APS March Meeting 2020. Vol 65. American Physical Society; 2020.' apa: 'Serlin, M., Tschirhart, C., Polshyn, H., Zhang, Y., Zhu, J., Huber, M. E., … Young, A. (2020). Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part II: Temperature dependence and current switching. In APS March Meeting 2020 (Vol. 65). Denver, CO, United States: American Physical Society.' chicago: 'Serlin, Marec, Charles Tschirhart, Hryhoriy Polshyn, Yuxuan Zhang, Jiacheng Zhu, Martin E. Huber, Leon Balents, Kenji Watanabe, Takashi Tanaguchi, and Andrea Young. “Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part II: Temperature Dependence and Current Switching.” In APS March Meeting 2020, Vol. 65. American Physical Society, 2020.' ieee: 'M. Serlin et al., “Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part II: Temperature dependence and current switching,” in APS March Meeting 2020, Denver, CO, United States, 2020, vol. 65, no. 1.' ista: 'Serlin M, Tschirhart C, Polshyn H, Zhang Y, Zhu J, Huber ME, Balents L, Watanabe K, Tanaguchi T, Young A. 2020. Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part II: Temperature dependence and current switching. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B59.00011.' mla: 'Serlin, Marec, et al. “Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part II: Temperature Dependence and Current Switching.” APS March Meeting 2020, vol. 65, no. 1, B59.00011, American Physical Society, 2020.' short: M. Serlin, C. Tschirhart, H. Polshyn, Y. Zhang, J. Zhu, M.E. Huber, L. Balents, K. Watanabe, T. Tanaguchi, A. Young, in:, APS March Meeting 2020, American Physical Society, 2020. conference: end_date: 2020-03-06 location: Denver, CO, United States name: 'APS: American Physical Society' start_date: 2020-03-02 date_created: 2022-01-28T10:46:57Z date_published: 2020-03-01T00:00:00Z date_updated: 2023-02-21T15:57:52Z day: '01' extern: '1' external_id: arxiv: - '1907.00261' intvolume: ' 65' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://meetings.aps.org/Meeting/MAR20/Session/B59.11 month: '03' oa: 1 oa_version: Published Version publication: APS March Meeting 2020 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '10619' relation: other status: public status: public title: 'Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part II: Temperature dependence and current switching' type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 65 year: '2020' ... --- _id: '10699' abstract: - lang: eng text: This is the third of three talks describing the observation and characterization of a ferromagnetic moiré heterostructure based on twisted bilayer graphene aligned to hexagonal boron nitride. In this segment I will present scanning probe magnetometry data acquired using a nanoSQUID-on-tip microscope, which provides ~150 nm spatial resolution and a field sensitivity of ~10 nT/rtHz. We study the distribution of magnetic domains within the device as a function of density, magnetic field training, and DC current. Our data allow us to constrain the magnitude of the orbital magnetic moment of the electrons in the QAH state. Comparison with simultaneously acquired transport data allows us to precisely correlate single domain dynamics with discrete jumps in the observed anomalous Hall signal. acknowledgement: I would like to thank the MURI program, Sloan foundation, AFOSR, and ARO for their generous support of this work. I would also like to thank the NSF GRFP and the Hertz foundation for their generous support of my graduate studies. alternative_title: - Bulletin of the American Physical Society article_number: B59.00013 article_processing_charge: No arxiv: 1 author: - first_name: Charles full_name: Tschirhart, Charles last_name: Tschirhart - first_name: Marec full_name: Serlin, Marec last_name: Serlin - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Yuxuan full_name: Zhang, Yuxuan last_name: Zhang - first_name: Jiacheng full_name: Zhu, Jiacheng last_name: Zhu - first_name: Leon full_name: Balents, Leon last_name: Balents - first_name: Martin E. full_name: Huber, Martin E. last_name: Huber - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Takashi full_name: Tanaguchi, Takashi last_name: Tanaguchi - first_name: Andrea full_name: Young, Andrea last_name: Young citation: ama: 'Tschirhart C, Serlin M, Polshyn H, et al. Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part III: Scanning probe magnetometry. In: APS March Meeting 2020. Vol 65. American Physical Society; 2020.' apa: 'Tschirhart, C., Serlin, M., Polshyn, H., Zhang, Y., Zhu, J., Balents, L., … Young, A. (2020). Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part III: Scanning probe magnetometry. In APS March Meeting 2020 (Vol. 65). Denver, CO, United States: American Physical Society.' chicago: 'Tschirhart, Charles, Marec Serlin, Hryhoriy Polshyn, Yuxuan Zhang, Jiacheng Zhu, Leon Balents, Martin E. Huber, Kenji Watanabe, Takashi Tanaguchi, and Andrea Young. “Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part III: Scanning Probe Magnetometry.” In APS March Meeting 2020, Vol. 65. American Physical Society, 2020.' ieee: 'C. Tschirhart et al., “Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part III: Scanning probe magnetometry,” in APS March Meeting 2020, Denver, CO, United States, 2020, vol. 65, no. 1.' ista: 'Tschirhart C, Serlin M, Polshyn H, Zhang Y, Zhu J, Balents L, Huber ME, Watanabe K, Tanaguchi T, Young A. 2020. Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part III: Scanning probe magnetometry. APS March Meeting 2020. APS: American Physical Society, Bulletin of the American Physical Society, vol. 65, B59.00013.' mla: 'Tschirhart, Charles, et al. “Intrinsic Quantized Anomalous Hall Effect in a Moiré Heterostructure, Part III: Scanning Probe Magnetometry.” APS March Meeting 2020, vol. 65, no. 1, B59.00013, American Physical Society, 2020.' short: C. Tschirhart, M. Serlin, H. Polshyn, Y. Zhang, J. Zhu, L. Balents, M.E. Huber, K. Watanabe, T. Tanaguchi, A. Young, in:, APS March Meeting 2020, American Physical Society, 2020. conference: end_date: 2020-03-06 location: Denver, CO, United States name: 'APS: American Physical Society' start_date: 2020-03-02 date_created: 2022-01-28T10:57:49Z date_published: 2020-03-01T00:00:00Z date_updated: 2023-02-21T15:57:52Z day: '01' extern: '1' external_id: arxiv: - '1907.00261' intvolume: ' 65' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://meetings.aps.org/Meeting/MAR20/Session/B59.13 month: '03' oa: 1 oa_version: Published Version publication: APS March Meeting 2020 publication_identifier: issn: - 0003-0503 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '10619' relation: other status: public status: public title: 'Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part III: Scanning probe magnetometry' type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 65 year: '2020' ... --- _id: '10701' abstract: - lang: eng text: Partially filled Landau levels host competing electronic orders. For example, electron solids may prevail close to integer filling of the Landau levels before giving way to fractional quantum Hall liquids at higher carrier density1,2. Here, we report the observation of an electron solid with non-collinear spin texture in monolayer graphene, consistent with solidification of skyrmions3—topological spin textures characterized by quantized electrical charge4,5. We probe the spin texture of the solids using a modified Corbino geometry that allows ferromagnetic magnons to be launched and detected6,7. We find that magnon transport is highly efficient when one Landau level is filled (ν=1), consistent with quantum Hall ferromagnetic spin polarization. However, even minimal doping immediately quenches the magnon signal while leaving the vanishing low-temperature charge conductivity unchanged. Our results can be understood by the formation of a solid of charged skyrmions near ν=1, whose non-collinear spin texture leads to rapid magnon decay. Data near fractional fillings show evidence of several fractional skyrmion solids, suggesting that graphene hosts a highly tunable landscape of coupled spin and charge orders. acknowledgement: We acknowledge discussions with B. Halperin, C. Huang, A. Macdonald and M. Zalatel. Experimental work at UCSB was supported by the Army Research Office under awards nos. MURI W911NF-16-1-0361 and W911NF-16-1-0482. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by MEXT (Japan) and CREST (JPMJCR15F3), JST. A.F.Y. acknowledges the support of the David and Lucile Packard Foundation and and Alfred. P. Sloan Foundation. article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Haoxin full_name: Zhou, Haoxin last_name: Zhou - first_name: Hryhoriy full_name: Polshyn, Hryhoriy id: edfc7cb1-526e-11ec-b05a-e6ecc27e4e48 last_name: Polshyn orcid: 0000-0001-8223-8896 - first_name: Takashi full_name: Taniguchi, Takashi last_name: Taniguchi - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Andrea F. full_name: Young, Andrea F. last_name: Young citation: ama: Zhou H, Polshyn H, Taniguchi T, Watanabe K, Young AF. Skyrmion solids in monolayer graphene. Nature Physics. 2020;16(2):154-158. doi:10.1038/s41567-019-0729-8 apa: Zhou, H., Polshyn, H., Taniguchi, T., Watanabe, K., & Young, A. F. (2020). Skyrmion solids in monolayer graphene. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-019-0729-8 chicago: Zhou, Haoxin, Hryhoriy Polshyn, Takashi Taniguchi, Kenji Watanabe, and Andrea F. Young. “Skyrmion Solids in Monolayer Graphene.” Nature Physics. Springer Nature, 2020. https://doi.org/10.1038/s41567-019-0729-8. ieee: H. Zhou, H. Polshyn, T. Taniguchi, K. Watanabe, and A. F. Young, “Skyrmion solids in monolayer graphene,” Nature Physics, vol. 16, no. 2. Springer Nature, pp. 154–158, 2020. ista: Zhou H, Polshyn H, Taniguchi T, Watanabe K, Young AF. 2020. Skyrmion solids in monolayer graphene. Nature Physics. 16(2), 154–158. mla: Zhou, Haoxin, et al. “Skyrmion Solids in Monolayer Graphene.” Nature Physics, vol. 16, no. 2, Springer Nature, 2020, pp. 154–58, doi:10.1038/s41567-019-0729-8. short: H. Zhou, H. Polshyn, T. Taniguchi, K. Watanabe, A.F. Young, Nature Physics 16 (2020) 154–158. date_created: 2022-01-28T12:04:09Z date_published: 2020-02-01T00:00:00Z date_updated: 2022-01-31T07:10:07Z day: '01' doi: 10.1038/s41567-019-0729-8 extern: '1' external_id: arxiv: - '1904.11485' intvolume: ' 16' issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1904.11485 month: '02' oa: 1 oa_version: Preprint page: 154-158 publication: Nature Physics publication_identifier: eissn: - 1745-2481 issn: - 1745-2473 publication_status: published publisher: Springer Nature quality_controlled: '1' status: public title: Skyrmion solids in monolayer graphene type: journal_article user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 16 year: '2020' ... --- _id: '10861' abstract: - lang: eng text: We introduce in this paper AMT2.0, a tool for qualitative and quantitative analysis of hybrid continuous and Boolean signals that combine numerical values and discrete events. The evaluation of the signals is based on rich temporal specifications expressed in extended signal temporal logic, which integrates timed regular expressions within signal temporal logic. The tool features qualitative monitoring (property satisfaction checking), trace diagnostics for explaining and justifying property violations and specification-driven measurement of quantitative features of the signal. We demonstrate the tool functionality on several running examples and case studies, and evaluate its performance. article_processing_charge: No article_type: original author: - first_name: Dejan full_name: Nickovic, Dejan id: 41BCEE5C-F248-11E8-B48F-1D18A9856A87 last_name: Nickovic - first_name: Olivier full_name: Lebeltel, Olivier last_name: Lebeltel - first_name: Oded full_name: Maler, Oded last_name: Maler - first_name: Thomas full_name: Ferrere, Thomas id: 40960E6E-F248-11E8-B48F-1D18A9856A87 last_name: Ferrere orcid: 0000-0001-5199-3143 - first_name: Dogan full_name: Ulus, Dogan last_name: Ulus citation: ama: 'Nickovic D, Lebeltel O, Maler O, Ferrere T, Ulus D. AMT 2.0: Qualitative and quantitative trace analysis with extended signal temporal logic. International Journal on Software Tools for Technology Transfer. 2020;22(6):741-758. doi:10.1007/s10009-020-00582-z' apa: 'Nickovic, D., Lebeltel, O., Maler, O., Ferrere, T., & Ulus, D. (2020). AMT 2.0: Qualitative and quantitative trace analysis with extended signal temporal logic. International Journal on Software Tools for Technology Transfer. Springer Nature. https://doi.org/10.1007/s10009-020-00582-z' chicago: 'Nickovic, Dejan, Olivier Lebeltel, Oded Maler, Thomas Ferrere, and Dogan Ulus. “AMT 2.0: Qualitative and Quantitative Trace Analysis with Extended Signal Temporal Logic.” International Journal on Software Tools for Technology Transfer. Springer Nature, 2020. https://doi.org/10.1007/s10009-020-00582-z.' ieee: 'D. Nickovic, O. Lebeltel, O. Maler, T. Ferrere, and D. Ulus, “AMT 2.0: Qualitative and quantitative trace analysis with extended signal temporal logic,” International Journal on Software Tools for Technology Transfer, vol. 22, no. 6. Springer Nature, pp. 741–758, 2020.' ista: 'Nickovic D, Lebeltel O, Maler O, Ferrere T, Ulus D. 2020. AMT 2.0: Qualitative and quantitative trace analysis with extended signal temporal logic. International Journal on Software Tools for Technology Transfer. 22(6), 741–758.' mla: 'Nickovic, Dejan, et al. “AMT 2.0: Qualitative and Quantitative Trace Analysis with Extended Signal Temporal Logic.” International Journal on Software Tools for Technology Transfer, vol. 22, no. 6, Springer Nature, 2020, pp. 741–58, doi:10.1007/s10009-020-00582-z.' short: D. Nickovic, O. Lebeltel, O. Maler, T. Ferrere, D. Ulus, International Journal on Software Tools for Technology Transfer 22 (2020) 741–758. date_created: 2022-03-18T10:10:53Z date_published: 2020-08-03T00:00:00Z date_updated: 2024-10-09T20:58:18Z day: '03' department: - _id: ToHe doi: 10.1007/s10009-020-00582-z external_id: isi: - '000555398600001' intvolume: ' 22' isi: 1 issue: '6' keyword: - Information Systems - Software language: - iso: eng month: '08' oa_version: None page: 741-758 publication: International Journal on Software Tools for Technology Transfer publication_identifier: eissn: - 1433-2787 issn: - 1433-2779 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '299' relation: earlier_version status: public scopus_import: '1' status: public title: 'AMT 2.0: Qualitative and quantitative trace analysis with extended signal temporal logic' type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 22 year: '2020' ... --- _id: '10862' abstract: - lang: eng text: We consider the sum of two large Hermitian matrices A and B with a Haar unitary conjugation bringing them into a general relative position. We prove that the eigenvalue density on the scale slightly above the local eigenvalue spacing is asymptotically given by the free additive convolution of the laws of A and B as the dimension of the matrix increases. This implies optimal rigidity of the eigenvalues and optimal rate of convergence in Voiculescu's theorem. Our previous works [4], [5] established these results in the bulk spectrum, the current paper completely settles the problem at the spectral edges provided they have the typical square-root behavior. The key element of our proof is to compensate the deterioration of the stability of the subordination equations by sharp error estimates that properly account for the local density near the edge. Our results also hold if the Haar unitary matrix is replaced by the Haar orthogonal matrix. acknowledgement: Partially supported by ERC Advanced Grant RANMAT No. 338804. article_number: '108639' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Zhigang full_name: Bao, Zhigang id: 442E6A6C-F248-11E8-B48F-1D18A9856A87 last_name: Bao orcid: 0000-0003-3036-1475 - first_name: László full_name: Erdös, László id: 4DBD5372-F248-11E8-B48F-1D18A9856A87 last_name: Erdös orcid: 0000-0001-5366-9603 - first_name: Kevin full_name: Schnelli, Kevin last_name: Schnelli citation: ama: Bao Z, Erdös L, Schnelli K. Spectral rigidity for addition of random matrices at the regular edge. Journal of Functional Analysis. 2020;279(7). doi:10.1016/j.jfa.2020.108639 apa: Bao, Z., Erdös, L., & Schnelli, K. (2020). Spectral rigidity for addition of random matrices at the regular edge. Journal of Functional Analysis. Elsevier. https://doi.org/10.1016/j.jfa.2020.108639 chicago: Bao, Zhigang, László Erdös, and Kevin Schnelli. “Spectral Rigidity for Addition of Random Matrices at the Regular Edge.” Journal of Functional Analysis. Elsevier, 2020. https://doi.org/10.1016/j.jfa.2020.108639. ieee: Z. Bao, L. Erdös, and K. Schnelli, “Spectral rigidity for addition of random matrices at the regular edge,” Journal of Functional Analysis, vol. 279, no. 7. Elsevier, 2020. ista: Bao Z, Erdös L, Schnelli K. 2020. Spectral rigidity for addition of random matrices at the regular edge. Journal of Functional Analysis. 279(7), 108639. mla: Bao, Zhigang, et al. “Spectral Rigidity for Addition of Random Matrices at the Regular Edge.” Journal of Functional Analysis, vol. 279, no. 7, 108639, Elsevier, 2020, doi:10.1016/j.jfa.2020.108639. short: Z. Bao, L. Erdös, K. Schnelli, Journal of Functional Analysis 279 (2020). corr_author: '1' date_created: 2022-03-18T10:18:59Z date_published: 2020-10-15T00:00:00Z date_updated: 2025-04-15T08:05:01Z day: '15' department: - _id: LaEr doi: 10.1016/j.jfa.2020.108639 ec_funded: 1 external_id: arxiv: - '1708.01597' isi: - '000559623200009' intvolume: ' 279' isi: 1 issue: '7' keyword: - Analysis language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1708.01597 month: '10' oa: 1 oa_version: Preprint project: - _id: 258DCDE6-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '338804' name: Random matrices, universality and disordered quantum systems publication: Journal of Functional Analysis publication_identifier: issn: - 0022-1236 publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: Spectral rigidity for addition of random matrices at the regular edge type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 279 year: '2020' ... --- _id: '10866' abstract: - lang: eng text: Recent discoveries have shown that, when two layers of van der Waals (vdW) materials are superimposed with a relative twist angle between them, the electronic properties of the coupled system can be dramatically altered. Here, we demonstrate that a similar concept can be extended to the optics realm, particularly to propagating phonon polaritons–hybrid light-matter interactions. To do this, we fabricate stacks composed of two twisted slabs of a vdW crystal (α-MoO3) supporting anisotropic phonon polaritons (PhPs), and image the propagation of the latter when launched by localized sources. Our images reveal that, under a critical angle, the PhPs isofrequency curve undergoes a topological transition, in which the propagation of PhPs is strongly guided (canalization regime) along predetermined directions without geometric spreading. These results demonstrate a new degree of freedom (twist angle) for controlling the propagation of polaritons at the nanoscale with potential for nanoimaging, (bio)-sensing, or heat management. acknowledgement: "J.T.-G. and G.Á.-P. acknowledge support through the Severo Ochoa Program from the\r\nGovernment of the Principality of Asturias (nos. PA-18-PF-BP17-126 and PA20-PF-BP19-053,\r\nrespectively). J. M-S acknowledges financial support through the Ramón y Cajal Program from\r\nthe Government of Spain (RYC2018-026196-I). A.Y.N. acknowledges the Spanish Ministry of\r\nScience, Innovation and Universities (national project no. MAT201788358-C3-3-R). P.A.-G.\r\nacknowledges support from the European Research Council under starting grant no. 715496,\r\n2DNANOPTICA." article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Jiahua full_name: Duan, Jiahua last_name: Duan - first_name: Nathaniel full_name: Capote-Robayna, Nathaniel last_name: Capote-Robayna - first_name: Javier full_name: Taboada-Gutiérrez, Javier last_name: Taboada-Gutiérrez - first_name: Gonzalo full_name: Álvarez-Pérez, Gonzalo last_name: Álvarez-Pérez - first_name: Ivan full_name: Prieto Gonzalez, Ivan id: 2A307FE2-F248-11E8-B48F-1D18A9856A87 last_name: Prieto Gonzalez orcid: 0000-0002-7370-5357 - first_name: Javier full_name: Martín-Sánchez, Javier last_name: Martín-Sánchez - first_name: Alexey Y. full_name: Nikitin, Alexey Y. last_name: Nikitin - first_name: Pablo full_name: Alonso-González, Pablo last_name: Alonso-González citation: ama: 'Duan J, Capote-Robayna N, Taboada-Gutiérrez J, et al. Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano Letters. 2020;20(7):5323-5329. doi:10.1021/acs.nanolett.0c01673' apa: 'Duan, J., Capote-Robayna, N., Taboada-Gutiérrez, J., Álvarez-Pérez, G., Prieto Gonzalez, I., Martín-Sánchez, J., … Alonso-González, P. (2020). Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.0c01673' chicago: 'Duan, Jiahua, Nathaniel Capote-Robayna, Javier Taboada-Gutiérrez, Gonzalo Álvarez-Pérez, Ivan Prieto Gonzalez, Javier Martín-Sánchez, Alexey Y. Nikitin, and Pablo Alonso-González. “Twisted Nano-Optics: Manipulating Light at the Nanoscale with Twisted Phonon Polaritonic Slabs.” Nano Letters. American Chemical Society, 2020. https://doi.org/10.1021/acs.nanolett.0c01673.' ieee: 'J. Duan et al., “Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs,” Nano Letters, vol. 20, no. 7. American Chemical Society, pp. 5323–5329, 2020.' ista: 'Duan J, Capote-Robayna N, Taboada-Gutiérrez J, Álvarez-Pérez G, Prieto Gonzalez I, Martín-Sánchez J, Nikitin AY, Alonso-González P. 2020. Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano Letters. 20(7), 5323–5329.' mla: 'Duan, Jiahua, et al. “Twisted Nano-Optics: Manipulating Light at the Nanoscale with Twisted Phonon Polaritonic Slabs.” Nano Letters, vol. 20, no. 7, American Chemical Society, 2020, pp. 5323–29, doi:10.1021/acs.nanolett.0c01673.' short: J. Duan, N. Capote-Robayna, J. Taboada-Gutiérrez, G. Álvarez-Pérez, I. Prieto Gonzalez, J. Martín-Sánchez, A.Y. Nikitin, P. Alonso-González, Nano Letters 20 (2020) 5323–5329. date_created: 2022-03-18T11:37:38Z date_published: 2020-07-01T00:00:00Z date_updated: 2023-09-05T12:05:58Z day: '01' department: - _id: NanoFab doi: 10.1021/acs.nanolett.0c01673 external_id: arxiv: - '2004.14599' isi: - '000548893200082' pmid: - '32530634' intvolume: ' 20' isi: 1 issue: '7' keyword: - Mechanical Engineering - Condensed Matter Physics - General Materials Science - General Chemistry - Bioengineering language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2004.14599 month: '07' oa: 1 oa_version: Preprint page: 5323-5329 pmid: 1 publication: Nano Letters publication_identifier: eissn: - 1530-6992 issn: - 1530-6984 publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: 'Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs' type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 20 year: '2020' ... --- _id: '10867' abstract: - lang: eng text: In this paper we find a tight estimate for Gromov’s waist of the balls in spaces of constant curvature, deduce the estimates for the balls in Riemannian manifolds with upper bounds on the curvature (CAT(ϰ)-spaces), and establish similar result for normed spaces. acknowledgement: ' Supported by the Russian Foundation for Basic Research grant 18-01-00036.' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Arseniy full_name: Akopyan, Arseniy id: 430D2C90-F248-11E8-B48F-1D18A9856A87 last_name: Akopyan orcid: 0000-0002-2548-617X - first_name: Roman full_name: Karasev, Roman last_name: Karasev citation: ama: Akopyan A, Karasev R. Waist of balls in hyperbolic and spherical spaces. International Mathematics Research Notices. 2020;2020(3):669-697. doi:10.1093/imrn/rny037 apa: Akopyan, A., & Karasev, R. (2020). Waist of balls in hyperbolic and spherical spaces. International Mathematics Research Notices. Oxford University Press. https://doi.org/10.1093/imrn/rny037 chicago: Akopyan, Arseniy, and Roman Karasev. “Waist of Balls in Hyperbolic and Spherical Spaces.” International Mathematics Research Notices. Oxford University Press, 2020. https://doi.org/10.1093/imrn/rny037. ieee: A. Akopyan and R. Karasev, “Waist of balls in hyperbolic and spherical spaces,” International Mathematics Research Notices, vol. 2020, no. 3. Oxford University Press, pp. 669–697, 2020. ista: Akopyan A, Karasev R. 2020. Waist of balls in hyperbolic and spherical spaces. International Mathematics Research Notices. 2020(3), 669–697. mla: Akopyan, Arseniy, and Roman Karasev. “Waist of Balls in Hyperbolic and Spherical Spaces.” International Mathematics Research Notices, vol. 2020, no. 3, Oxford University Press, 2020, pp. 669–97, doi:10.1093/imrn/rny037. short: A. Akopyan, R. Karasev, International Mathematics Research Notices 2020 (2020) 669–697. date_created: 2022-03-18T11:39:30Z date_published: 2020-02-01T00:00:00Z date_updated: 2023-08-24T14:19:55Z day: '01' department: - _id: HeEd doi: 10.1093/imrn/rny037 external_id: arxiv: - '1702.07513' isi: - '000522852700002' intvolume: ' 2020' isi: 1 issue: '3' keyword: - General Mathematics language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1702.07513 month: '02' oa: 1 oa_version: Preprint page: 669-697 publication: International Mathematics Research Notices publication_identifier: eissn: - 1687-0247 issn: - 1073-7928 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: Waist of balls in hyperbolic and spherical spaces type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 2020 year: '2020' ...