[{"date_updated":"2026-05-20T06:34:50Z","oa":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","acknowledgement":"We acknowledge Franco De Palma, Mahya Khorramshahi, Fabian Oppliger, Thomas Reisinger, Pasquale Scarlino and Xiao Xue for helpful discussions. We thank Simon Robson for proofreading the manuscript. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the Nanofabrication facility. This research and related results were made possible with the support of the NOMIS Foundation and the HORIZON-RIA 101069515 project. This research was funded in whole or in part by the Austrian Science Fund (FWF) DOI:10.55776/P32235, DOI:10.55776/I5060 and DOI:10.55776/P36507. For Open Access purposes, the author has applied a CC BY public copyright license to any author accepted manuscript version arising from this submission. M.J. acknowledges funding from FellowQUTE 2024-01. I.M.P. acknowledges funding from the Deutsche Forschungsgemeinschaft (DFG – German Research Foundation) under project number 450396347 (GeHoldeQED). ICN2 acknowledges funding from Generalitat de Catalunya 2021SGR00457. We acknowledge support from CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+). This research work has been funded by the European Commission – NextGenerationEU (Regulation EU 2020/2094), through CSIC's Quantum Technologies Platform (QTEP). ICN2 is supported by the Severo Ochoa program from Spanish MCIN/AEI (Grant No.: CEX2021-001214-S) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD program. AGM has received funding from Grant RYC2021-033479-I funded by MCIN/AEI/10.13039/501100011033 and by European Union NextGenerationEU/PRTR. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. The authors acknowledge the use of instrumentation and the technical advice provided by the Joint Electron Microscopy Center at ALBA (JEMCA). ICN2 acknowledges funding from Grant IU16-014206 (METCAM-FIB) funded by the European Union through the European Regional Development Fund (ERDF), with the support of the Ministry of Research and Universities, Generalitat de Catalunya. ICN2 is a founding member of e-DREAM.","citation":{"mla":"Janik, Marian. <i>Research Data for Publication “Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors.”</i> Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:18886\">10.15479/AT:ISTA:18886</a>.","chicago":"Janik, Marian. “Research Data for Publication ‘Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors.’” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT:ISTA:18886\">https://doi.org/10.15479/AT:ISTA:18886</a>.","ama":"Janik M. Research data for publication “Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors.” 2025. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:18886\">10.15479/AT:ISTA:18886</a>","ieee":"M. Janik, “Research data for publication ‘Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors.’” Institute of Science and Technology Austria, 2025.","short":"M. Janik, (2025).","ista":"Janik M. 2025. Research data for publication ‘Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors’, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT:ISTA:18886\">10.15479/AT:ISTA:18886</a>.","apa":"Janik, M. (2025). Research data for publication “Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors.” Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:18886\">https://doi.org/10.15479/AT:ISTA:18886</a>"},"OA_type":"gold","type":"research_data","project":[{"_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452","name":"Integrated Germanium Quantum Technology","grant_number":"101069515"},{"call_identifier":"FWF","name":"Towards scalable hut wire quantum devices","grant_number":"P32235","_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E"},{"_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a","name":"Merging spin and superconducting qubits in planar Ge","grant_number":"P36507"},{"_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1","name":"High impedance circuit quantum electrodynamics with hole spins","grant_number":"I05060"}],"abstract":[{"lang":"eng","text":"Research Data for publication 'Strong charge-photon coupling in planar germanium enabled by granular 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M."},{"orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios","last_name":"Katsaros","first_name":"Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"article_number":"2103","status":"public","file":[{"date_created":"2025-03-17T10:53:32Z","success":1,"content_type":"application/pdf","file_name":"2025_NatureComm_Janik.pdf","access_level":"open_access","date_updated":"2025-03-17T10:53:32Z","file_id":"19415","checksum":"a9383dd978ca2c50b7dded6c0bb2cd49","creator":"dernst","file_size":6364878,"relation":"main_file"}],"arxiv":1,"APC_amount":"7068 EUR","has_accepted_license":"1","department":[{"_id":"GeKa"},{"_id":"JoFi"},{"_id":"M-Shop"}],"external_id":{"isi":["001434774800001"],"pmid":["40025007"],"arxiv":["2407.03079"]},"corr_author":"1","publication_status":"published","file_date_updated":"2025-03-17T10:53:32Z","month":"03","language":[{"iso":"eng"}],"day":"01","volume":16,"publication":"Nature Communications","project":[{"_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452","grant_number":"101069515","name":"Integrated Germanium Quantum Technology"},{"grant_number":"P32235","name":"Towards scalable hut wire quantum devices","call_identifier":"FWF","_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E"},{"_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1","name":"High impedance circuit quantum electrodynamics with hole spins","grant_number":"I05060"},{"grant_number":"P36507","name":"Merging spin and superconducting qubits in planar Ge","_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a"},{"grant_number":"101034413","name":"IST-BRIDGE: International postdoctoral program","call_identifier":"H2020","_id":"fc2ed2f7-9c52-11eb-aca3-c01059dda49c"},{"call_identifier":"FWF","name":"FWF Open Access Fund","_id":"3AC91DDA-15DF-11EA-824D-93A3E7B544D1"}],"type":"journal_article","OA_type":"gold","oa_version":"Published Version","article_processing_charge":"Yes","abstract":[{"lang":"eng","text":"High kinetic inductance superconductors are gaining increasing interest for the realisation of qubits, amplifiers and detectors. Moreover, thanks to their high impedance, quantum buses made of such materials enable large zero-point fluctuations of the voltage, boosting the coupling rates to spin and charge qubits. However, fully exploiting the potential of disordered or granular superconductors is challenging, as their inductance and, therefore, impedance at high values are difficult to control. Here, we report a reproducible fabrication of granular aluminium resonators by developing a wireless ohmmeter, which allows in situ measurements during film deposition and, therefore, control of the kinetic inductance of granular aluminium films. Reproducible fabrication of circuits with impedances (inductances) exceeding 13 kΩ (1 nH per square) is now possible. By integrating a 7.9 kΩ resonator with a germanium double quantum dot, we demonstrate strong charge-photon coupling with a rate of gc/2π = 566 ± 2 MHz. This broadly applicable method opens the path for novel qubits and high-fidelity, long-distance two-qubit gates."}],"_id":"19401","doi":"10.1038/s41467-025-57252-4","citation":{"ieee":"M. Janik <i>et al.</i>, “Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors,” <i>Nature Communications</i>, vol. 16. Springer Nature, 2025.","ista":"Janik M, Roux KER, Borja Espinosa CN, Sagi O, Baghdadi A, Adletzberger T, Calcaterra S, Botifoll M, Garzón Manjón A, Arbiol J, Chrastina D, Isella G, Pop IM, Katsaros G. 2025. Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors. Nature Communications. 16, 2103.","apa":"Janik, M., Roux, K. E. R., Borja Espinosa, C. N., Sagi, O., Baghdadi, A., Adletzberger, T., … Katsaros, G. (2025). Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-025-57252-4\">https://doi.org/10.1038/s41467-025-57252-4</a>","short":"M. Janik, K.E.R. Roux, C.N. Borja Espinosa, O. Sagi, A. Baghdadi, T. Adletzberger, S. Calcaterra, M. Botifoll, A. Garzón Manjón, J. Arbiol, D. Chrastina, G. Isella, I.M. Pop, G. Katsaros, Nature Communications 16 (2025).","chicago":"Janik, Marian, Kevin Etienne Robert Roux, Carla N Borja Espinosa, Oliver Sagi, Abdulhamid Baghdadi, Thomas Adletzberger, Stefano Calcaterra, et al. “Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors.” <i>Nature Communications</i>. Springer Nature, 2025. <a href=\"https://doi.org/10.1038/s41467-025-57252-4\">https://doi.org/10.1038/s41467-025-57252-4</a>.","mla":"Janik, Marian, et al. “Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors.” <i>Nature Communications</i>, vol. 16, 2103, Springer Nature, 2025, doi:<a href=\"https://doi.org/10.1038/s41467-025-57252-4\">10.1038/s41467-025-57252-4</a>.","ama":"Janik M, Roux KER, Borja Espinosa CN, et al. Strong charge-photon coupling in planar germanium enabled by granular aluminium superinductors. <i>Nature Communications</i>. 2025;16. doi:<a href=\"https://doi.org/10.1038/s41467-025-57252-4\">10.1038/s41467-025-57252-4</a>"},"date_updated":"2026-05-20T06:34:51Z","acknowledgement":"We acknowledge Franco De Palma, Mahya Khorramshahi, Fabian Oppliger, Thomas Reisinger, Pasquale Scarlino and Xiao Xue for helpful discussions. We thank Simon Robson for proofreading the manuscript. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the Nanofabrication facility. This research and related results were made possible with the support of the NOMIS Foundation and the HORIZON-RIA 101069515 project. This research was funded in whole or in part by the Austrian Science Fund (FWF) https://doi.org/10.55776/P32235, https://doi.org/10.55776/I5060 and https://doi.org/10.55776/P36507. For Open Access purposes, the author has applied a CC BY public copyright license to any author accepted manuscript version arising from this submission. M.J. acknowledges funding from FellowQUTE 2024-01. K.R. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 101034413. I.M.P. acknowledges funding from the Deutsche Forschungsgemeinschaft (DFG - German Research Foundation) under project number 450396347 (GeHoldeQED). ICN2 acknowledges funding from Generalitat de Catalunya 2021SGR00457. We acknowledge support from CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+). This research work has been funded by the European Commission - NextGenerationEU (Regulation EU 2020/2094), through CSIC’s Quantum Technologies Platform (QTEP). ICN2 is supported by the Severo Ochoa programme from Spanish MCIN/AEI (Grant No.: CEX2021-001214-S) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD programme. AGM has received funding from Grant RYC2021-033479-I funded by MCIN/AEI/10.13039/501100011033 and by European Union NextGenerationEU/PRTR. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. The authors acknowledge the use of instrumentation and the technical advice provided by the Joint Electron Microscopy Centre at ALBA (JEMCA). ICN2 acknowledges funding from Grant IU16-014206 (METCAM-FIB) funded by the European Union through the European Regional Development Fund (ERDF), with the support of the Ministry of Research and Universities, Generalitat de Catalunya. ICN2 is a founding member of e-DREAM60.","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1},{"author":[{"full_name":"Saez Mollejo, Jaime","last_name":"Saez Mollejo","id":"e0390f72-f6e0-11ea-865d-862393336714","first_name":"Jaime"}],"OA_place":"publisher","publisher":"Institute of Science and Technology Austria","year":"2025","ddc":["530"],"date_created":"2025-03-17T08:57:09Z","date_published":"2025-03-17T00:00:00Z","related_material":{"record":[{"relation":"used_in_publication","id":"19424","status":"public"}]},"acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}],"title":"Exchange anisotropies in microwave-driven singlet-triplet qubits","corr_author":"1","department":[{"_id":"GradSch"},{"_id":"GeKa"}],"has_accepted_license":"1","file":[{"creator":"jsaezmol","checksum":"1f21c8ea2196776aae51cc3a5d00e00b","file_size":21971911,"relation":"main_file","success":1,"content_type":"application/x-zip-compressed","file_name":"AllDataPublished.zip","date_created":"2025-03-17T08:48:09Z","file_id":"19410","access_level":"open_access","date_updated":"2025-03-17T08:48:09Z"}],"status":"public","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"day":"17","month":"03","file_date_updated":"2025-03-17T08:48:09Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"acknowledgement":"We thank A. Crippa for helpful discussions. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the Nanofabrication facility. This research and related results were made possible with the support of the NOMIS Foundation, the HORIZON-RIA 101069515 project and the FWF Projects \r\nwith DOI:10.55776/F86 and DOI:10.55776/I5060. M.R.-R. acknowledges support from the Netherlands Organization of\r\n scientific Research (NWO) under Veni grant VI.Veni.212.223. The Research of S.B. and M.R.-R. was sponsored in part by the Army Research Office and was accomplished under Award Number: W911NF-23-1-0110.","date_updated":"2026-05-20T06:42:16Z","citation":{"ama":"Saez Mollejo J. Exchange anisotropies in microwave-driven singlet-triplet qubits. 2025. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:19409\">10.15479/AT:ISTA:19409</a>","mla":"Saez Mollejo, Jaime. <i>Exchange Anisotropies in Microwave-Driven Singlet-Triplet Qubits</i>. Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:19409\">10.15479/AT:ISTA:19409</a>.","chicago":"Saez Mollejo, Jaime. “Exchange Anisotropies in Microwave-Driven Singlet-Triplet Qubits.” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT:ISTA:19409\">https://doi.org/10.15479/AT:ISTA:19409</a>.","short":"J. Saez Mollejo, (2025).","ista":"Saez Mollejo J. 2025. Exchange anisotropies in microwave-driven singlet-triplet qubits, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT:ISTA:19409\">10.15479/AT:ISTA:19409</a>.","apa":"Saez Mollejo, J. (2025). Exchange anisotropies in microwave-driven singlet-triplet qubits. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:19409\">https://doi.org/10.15479/AT:ISTA:19409</a>","ieee":"J. Saez Mollejo, “Exchange anisotropies in microwave-driven singlet-triplet qubits.” Institute of Science and Technology Austria, 2025."},"doi":"10.15479/AT:ISTA:19409","_id":"19409","abstract":[{"lang":"eng","text":"This .zip file contains the data to reproduce the figures and supplementary figures of \"Exchange anisotropies in microwave-driven singlet-triplet qubits\" by Jaime Saez-Mollejo et al.\r\n"}],"contributor":[{"orcid":"0000-0002-7197-4801","last_name":"Jirovec","first_name":"Daniel","id":"4C473F58-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Yona A","id":"fe39122d-06bb-11ec-a33b-9e22b40e40a5","last_name":"Schell"},{"last_name":"Kukucka","id":"3F5D8856-F248-11E8-B48F-1D18A9856A87","first_name":"Josip"},{"last_name":"Calcaterra","first_name":"Stefano"},{"last_name":"Chrastina","first_name":"Daniel "},{"first_name":"Giovanni ","last_name":"Isella"},{"first_name":"Maximilian","last_name":"Rimbach-Russ"},{"first_name":"Stefano","last_name":"Bosco"},{"last_name":"Katsaros","orcid":"0000-0001-8342-202X","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios"}],"oa_version":"Published Version","article_processing_charge":"No","OA_type":"gold","project":[{"grant_number":"101069515","name":"Integrated Germanium Quantum Technology","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"name":"High impedance circuit quantum electrodynamics with hole spins","grant_number":"I05060","_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1"},{"name":"Center for Correlated Quantum Materials and Solid State Quantum Systems: Conventional  and unconventional topological superconductors","grant_number":"F8606","_id":"34a66131-11ca-11ed-8bc3-a31681c6b03e"}],"type":"research_data"},{"day":"01","year":"2025","author":[{"full_name":"Saez Mollejo, Jaime","last_name":"Saez Mollejo","first_name":"Jaime","id":"e0390f72-f6e0-11ea-865d-862393336714"}],"publisher":"Institute of Science and Technology Austria","ddc":["530"],"month":"06","date_created":"2025-06-24T06:56:03Z","date_published":"2025-06-01T00:00:00Z","file_date_updated":"2025-06-25T07:11:52Z","title":"Automated All-RF Tuning for Spin Qubit Readout and Control","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"date_updated":"2025-07-01T07:19:26Z","acknowledgement":"The authors would like to thank Barnaby van Straaten, Jonas Schuff, Daniel Jirovec and Hanifa Tidjani for fruitful discussions. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the Nanofabrication Facility. G.K. acknowledges support from the NOMIS Foundation, the HORIZON-RIA (project no. 101069515) and the FWF Projects (DOIs: 10.55776/F86 and 10.55776/I5060). N.A. acknowledges support from the European Research Council (grant agreement 948932), and the Royal Society (grant no. URF/R1/191150). This project received support from the US Army Research Office (ARO) under Award No. W911NF-24-2-0043. C.C. acknowledges support from the UKRI Doctoral Training Partnership related to EP/W524311/1 (project ref. 2887634).","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"department":[{"_id":"GradSch"},{"_id":"GeKa"}],"has_accepted_license":"1","citation":{"ama":"Saez Mollejo J. Automated All-RF Tuning for Spin Qubit Readout and Control. 2025. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:19885\">10.15479/AT:ISTA:19885</a>","mla":"Saez Mollejo, Jaime. <i>Automated All-RF Tuning for Spin Qubit Readout and Control</i>. Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:19885\">10.15479/AT:ISTA:19885</a>.","chicago":"Saez Mollejo, Jaime. “Automated All-RF Tuning for Spin Qubit Readout and Control.” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT:ISTA:19885\">https://doi.org/10.15479/AT:ISTA:19885</a>.","short":"J. Saez Mollejo, (2025).","apa":"Saez Mollejo, J. (2025). Automated All-RF Tuning for Spin Qubit Readout and Control. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:19885\">https://doi.org/10.15479/AT:ISTA:19885</a>","ista":"Saez Mollejo J. 2025. Automated All-RF Tuning for Spin Qubit Readout and Control, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT:ISTA:19885\">10.15479/AT:ISTA:19885</a>.","ieee":"J. Saez Mollejo, “Automated All-RF Tuning for Spin Qubit Readout and Control.” Institute of Science and Technology Austria, 2025."},"corr_author":"1","type":"research_data","project":[{"grant_number":"101069515","name":"Integrated Germanium Quantum Technology","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1","grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins"},{"grant_number":"F8606","name":"Center for Correlated Quantum Materials and Solid State Quantum Systems: Conventional  and unconventional topological superconductors","_id":"34a66131-11ca-11ed-8bc3-a31681c6b03e"}],"contributor":[{"last_name":"Carlsson","contributor_type":"researcher","first_name":"Cornelius"},{"first_name":"Federico ","last_name":"Fedele","contributor_type":"researcher"},{"first_name":"Stefano","contributor_type":"researcher","last_name":"Calcaterra"},{"last_name":"Chrastina","contributor_type":"researcher","first_name":" Daniel "},{"last_name":"Isella","contributor_type":"researcher","first_name":"Giovanni "},{"id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios","contributor_type":"researcher","orcid":"0000-0001-8342-202X","last_name":"Katsaros"},{"contributor_type":"researcher","last_name":"Ares","first_name":"Natalia"}],"_id":"19885","doi":"10.15479/AT:ISTA:19885","abstract":[{"text":"This .zip file contains the data to reproduce the figures and supplementary figures of \"Automated All-RF Tuning for Spin Qubit Readout and Control\" by Cornelius Carlsson and Jaime Saez-Mollejo et al.","lang":"eng"}],"article_processing_charge":"No","oa_version":"Published Version","file":[{"relation":"main_file","file_size":3404814792,"creator":"jsaezmol","checksum":"eff1ae9e46599fdfab8da00a2ca3c289","file_id":"19893","date_updated":"2025-06-24T15:14:13Z","access_level":"open_access","file_name":"DatasetsPaper.zip","success":1,"content_type":"application/x-zip-compressed","date_created":"2025-06-24T15:14:13Z"},{"file_name":"README.txt","success":1,"content_type":"text/plain","date_created":"2025-06-25T07:11:52Z","file_id":"19899","date_updated":"2025-06-25T07:11:52Z","access_level":"open_access","file_size":622,"creator":"jsaezmol","checksum":"21840ceac04d677a799b8e5bd919804f","relation":"main_file"}],"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public"},{"related_material":{"link":[{"description":"News on ISTA website","relation":"research_data","url":"https://ista.ac.at/en/news/the-shadow-of-an-electron/"}],"record":[{"status":"public","relation":"research_data","id":"19409"},{"status":"public","id":"19836","relation":"dissertation_contains"}]},"date_published":"2025-04-24T00:00:00Z","title":"Exchange anisotropies in microwave-driven singlet-triplet qubits","article_type":"original","scopus_import":"1","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"year":"2025","intvolume":"        16","publisher":"Springer Nature","author":[{"full_name":"Saez Mollejo, Jaime","last_name":"Saez Mollejo","first_name":"Jaime","id":"e0390f72-f6e0-11ea-865d-862393336714"},{"orcid":"0000-0002-7197-4801","full_name":"Jirovec, Daniel","last_name":"Jirovec","first_name":"Daniel","id":"4C473F58-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Schell","full_name":"Schell, Yona A","first_name":"Yona A","id":"fe39122d-06bb-11ec-a33b-9e22b40e40a5"},{"first_name":"Josip","id":"3F5D8856-F248-11E8-B48F-1D18A9856A87","last_name":"Kukucka","full_name":"Kukucka, Josip"},{"last_name":"Calcaterra","full_name":"Calcaterra, Stefano","first_name":"Stefano"},{"full_name":"Chrastina, Daniel","last_name":"Chrastina","first_name":"Daniel"},{"full_name":"Isella, Giovanni","last_name":"Isella","first_name":"Giovanni"},{"last_name":"Rimbach-Russ","full_name":"Rimbach-Russ, Maximilian","first_name":"Maximilian"},{"first_name":"Stefano","full_name":"Bosco, Stefano","last_name":"Bosco"},{"id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios","orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios","last_name":"Katsaros"}],"OA_place":"publisher","date_created":"2025-03-19T13:28:12Z","isi":1,"quality_controlled":"1","ddc":["530"],"DOAJ_listed":"1","publication_identifier":{"eissn":["2041-1723"]},"pmid":1,"file":[{"date_created":"2025-05-05T07:08:23Z","success":1,"content_type":"application/pdf","file_name":"2025_NatureComm_SaezMollejo.pdf","date_updated":"2025-05-05T07:08:23Z","access_level":"open_access","file_id":"19645","creator":"dernst","checksum":"13fe84cddc9d4e47213bf17acdac70d7","file_size":1548756,"relation":"main_file"}],"arxiv":1,"APC_amount":"7068 EUR","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","article_number":"3862","has_accepted_license":"1","department":[{"_id":"GeKa"}],"corr_author":"1","external_id":{"pmid":["40274808"],"isi":["001475587400022"],"arxiv":["2408.03224"]},"publication_status":"published","file_date_updated":"2025-05-05T07:08:23Z","day":"24","volume":16,"language":[{"iso":"eng"}],"month":"04","project":[{"grant_number":"101069515","name":"Integrated Germanium Quantum Technology","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"_id":"34a66131-11ca-11ed-8bc3-a31681c6b03e","name":"Center for Correlated Quantum Materials and Solid State Quantum Systems: Conventional  and unconventional topological superconductors","grant_number":"F8606"},{"grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins","_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1"},{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"262116AA-B435-11E9-9278-68D0E5697425"},{"call_identifier":"FWF","name":"FWF Open Access Fund","_id":"3AC91DDA-15DF-11EA-824D-93A3E7B544D1"}],"type":"journal_article","OA_type":"gold","article_processing_charge":"Yes","oa_version":"Published Version","_id":"19424","doi":"10.1038/s41467-025-58969-y","abstract":[{"lang":"eng","text":"Hole spin qubits are rapidly emerging as the workhorse of semiconducting quantum processors because of their large spin-orbit interaction, enabling fast all-electric operations at low power. However, spin-orbit interaction also causes non-uniformities in devices, resulting in locally varying qubit energies and site-dependent anisotropies. While these anisotropies can be used to drive single-spins, if not properly harnessed, they can hinder the path toward large-scale quantum processors. Here, we report on microwave-driven singlet-triplet qubits in planar germanium and use them to investigate the anisotropy of two spins in a double quantum dot. We show two distinct operating regimes depending on the magnetic field direction. For in-plane fields, the two spins are largely anisotropic, and electrically tunable, which enables to measure all the available transitions; coherence times exceeding 3 $\\mu$s are extracted. For out-of-plane fields, they have an isotropic response but preserve the substantial energy difference required to address the singlet-triplet qubit. Even in this field direction, where the qubit lifetime\r\nis strongly affected by nuclear spins, we find 400 ns coherence times. Our work adds a valuable tool to investigate and harness the anisotropy of spin qubits and can be implemented in any large-scale NxN device, facilitating the path towards scalable quantum processors."}],"publication":"Nature Communications","date_updated":"2026-08-22T22:31:07Z","oa":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","acknowledgement":"We thank A. Crippa for helpful discussions. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the Nanofabrication facility. This research and related results were made possible with the support of the NOMIS Foundation, the HORIZON-RIA 101069515 project and the FWF Projects with DOI:10.55776/F86 and DOI:10.55776/I5060. M.R.-R. acknowledges support from the Netherlands Organization of Scientific Research (NWO) under Veni grant VI.Veni.212.223. The\r\nResearch of S.B. and M.R.-R. was sponsored in part by the Army Research Office and was accomplished under Award Number: W911NF-23-1-0110. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein.","citation":{"mla":"Saez Mollejo, Jaime, et al. “Exchange Anisotropies in Microwave-Driven Singlet-Triplet Qubits.” <i>Nature Communications</i>, vol. 16, 3862, Springer Nature, 2025, doi:<a href=\"https://doi.org/10.1038/s41467-025-58969-y\">10.1038/s41467-025-58969-y</a>.","chicago":"Saez Mollejo, Jaime, Daniel Jirovec, Yona A Schell, Josip Kukucka, Stefano Calcaterra, Daniel Chrastina, Giovanni Isella, Maximilian Rimbach-Russ, Stefano Bosco, and Georgios Katsaros. “Exchange Anisotropies in Microwave-Driven Singlet-Triplet Qubits.” <i>Nature Communications</i>. Springer Nature, 2025. <a href=\"https://doi.org/10.1038/s41467-025-58969-y\">https://doi.org/10.1038/s41467-025-58969-y</a>.","ama":"Saez Mollejo J, Jirovec D, Schell YA, et al. Exchange anisotropies in microwave-driven singlet-triplet qubits. <i>Nature Communications</i>. 2025;16. doi:<a href=\"https://doi.org/10.1038/s41467-025-58969-y\">10.1038/s41467-025-58969-y</a>","ieee":"J. Saez Mollejo <i>et al.</i>, “Exchange anisotropies in microwave-driven singlet-triplet qubits,” <i>Nature Communications</i>, vol. 16. Springer Nature, 2025.","short":"J. Saez Mollejo, D. Jirovec, Y.A. Schell, J. Kukucka, S. Calcaterra, D. Chrastina, G. Isella, M. Rimbach-Russ, S. Bosco, G. Katsaros, Nature Communications 16 (2025).","ista":"Saez Mollejo J, Jirovec D, Schell YA, Kukucka J, Calcaterra S, Chrastina D, Isella G, Rimbach-Russ M, Bosco S, Katsaros G. 2025. Exchange anisotropies in microwave-driven singlet-triplet qubits. Nature Communications. 16, 3862.","apa":"Saez Mollejo, J., Jirovec, D., Schell, Y. A., Kukucka, J., Calcaterra, S., Chrastina, D., … Katsaros, G. (2025). Exchange anisotropies in microwave-driven singlet-triplet qubits. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-025-58969-y\">https://doi.org/10.1038/s41467-025-58969-y</a>"}},{"supervisor":[{"orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios","last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios"}],"abstract":[{"text":"Over the past century, researchers have been fascinated by the quantum nature of the\r\nphysical world, initially striving to understand its fundamental principles and consequences, and\r\neventually progressing toward engineering systems that can control and manipulate quantum\r\nproperties. Today, we stand at the dawn of the quantum technology era. While some quantum\r\ntechnologies follow well-defined roadmaps, others are still in the exciting and uncertain early\r\nstages of development. In the fields of quantum computing and quantum simulation, research\r\nis being conducted across a wide variety of platforms. Each of these demonstrates control over\r\nquantum properties but also faces challenges in scaling up to the level of a mature technology.\r\nThis thesis explores some of the fundamental properties of hole spin qubits in planar germanium.\r\nSemiconductor spin qubits are considered strong candidates for the realization of quantum\r\nprocessors, owing to their long relaxation and coherence times, as well as their compatibility\r\nwith existing semiconductor industry infrastructure. Among these, hole spin qubits in planar\r\ngermanium are particularly promising. Their advantages include a large effective mass, which\r\neases fabrication constraints; inherent protection from hyperfine noise; and strong spin-orbit\r\ninteraction, which enables fast and purely electrical control. However, spin-orbit coupling also\r\nintroduces site-dependent variability across qubits, particularly in the g-tensors and spin-flip\r\ntunneling, which might cause that the quantization axes are not aligned. In this thesis, we\r\ninvestigate the tilt between the quantization axes of two hole spins hosted in a double quantum\r\ndot as a function of both the magnetic field direction and various electrostatic configurations,\r\ndemonstrating that both parameters influence this tilt. We conclude by introducing a machine-learning-assisted routine to automatically tune baseband spin qubits. This approach may prove\r\nto be a powerful tool for characterizing spin-orbit effects and gaining deeper insight into the\r\nphysics governing spin qubit behavior.\r\n","lang":"eng"}],"_id":"19836","doi":"10.15479/AT-ISTA-19836","oa_version":"Published Version","article_processing_charge":"No","project":[{"grant_number":"101069515","name":"Integrated Germanium Quantum Technology","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"name":"Center for Correlated Quantum Materials and Solid State Quantum Systems: Conventional  and unconventional topological superconductors","grant_number":"F8606","_id":"34a66131-11ca-11ed-8bc3-a31681c6b03e"},{"name":"High impedance circuit quantum electrodynamics with hole spins","grant_number":"I05060","_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1"}],"type":"dissertation","page":"175","citation":{"short":"J. Saez Mollejo, Singlet-Triplet Qubits in Planar Germanium: From Exchange Anisotropies to Autonomous Tuning , Institute of Science and Technology Austria, 2025.","apa":"Saez Mollejo, J. (2025). <i>Singlet-triplet qubits in planar Germanium: From exchange anisotropies to autonomous tuning </i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-19836\">https://doi.org/10.15479/AT-ISTA-19836</a>","ista":"Saez Mollejo J. 2025. Singlet-triplet qubits in planar Germanium: From exchange anisotropies to autonomous tuning . Institute of Science and Technology Austria.","ieee":"J. Saez Mollejo, “Singlet-triplet qubits in planar Germanium: From exchange anisotropies to autonomous tuning ,” Institute of Science and Technology Austria, 2025.","ama":"Saez Mollejo J. Singlet-triplet qubits in planar Germanium: From exchange anisotropies to autonomous tuning . 2025. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-19836\">10.15479/AT-ISTA-19836</a>","mla":"Saez Mollejo, Jaime. <i>Singlet-Triplet Qubits in Planar Germanium: From Exchange Anisotropies to Autonomous Tuning </i>. Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-19836\">10.15479/AT-ISTA-19836</a>.","chicago":"Saez Mollejo, Jaime. “Singlet-Triplet Qubits in Planar Germanium: From Exchange Anisotropies to Autonomous Tuning .” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT-ISTA-19836\">https://doi.org/10.15479/AT-ISTA-19836</a>."},"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","oa":1,"acknowledgement":"This research was supported by the Scientific Service Units of ISTA through resources provided\r\nby the MIBA Machine Shop and the Nanofabrication facility. We acknowledge the support from\r\nthe European Commission with the project Integrated Germanium Quantum Technology (with\r\nDOI:10.3030/101069515), the NOMIS Foundation, the HORIZON-RIA 101069515 project and\r\nthe FWF Projects Center for Correlated Quantum Materials and Solid State Quantum Systems:\r\nConventional and unconventional topological superconductors (with DOI:10.55776/F86) and\r\nHigh impedance circuit quantum electrodynamics with hole spins (with DOI:10.55776/I5060).\r\n","date_updated":"2026-07-29T12:55:59Z","file_date_updated":"2026-04-01T22:30:07Z","doi_confirm":"1","degree_awarded":"PhD","language":[{"iso":"eng"}],"month":"06","day":"13","status":"public","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"alternative_title":["ISTA Thesis"],"file":[{"file_id":"19849","embargo_to":"open_access","access_level":"closed","date_updated":"2026-04-01T22:30:07Z","file_name":"istaustriathesis-master - Copy.zip","content_type":"application/x-zip-compressed","date_created":"2025-06-16T09:38:49Z","relation":"source_file","file_size":59892829,"creator":"jsaezmol","checksum":"643bfddead59857536cce4d57c775b32"},{"relation":"main_file","creator":"jsaezmol","checksum":"e3dcb767fcc2b1787a455fdda991cefb","file_size":22382376,"embargo":"2026-04-01","file_id":"19851","access_level":"open_access","date_updated":"2026-04-01T22:30:07Z","content_type":"application/pdf","file_name":"SaezMollejo_PhDFinal_pdfa-1b.pdf","date_created":"2025-06-18T08:50:16Z"}],"corr_author":"1","publication_status":"published","department":[{"_id":"GradSch"},{"_id":"GeKa"}],"has_accepted_license":"1","acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}],"title":"Singlet-triplet qubits in planar Germanium: From exchange anisotropies to autonomous tuning ","date_published":"2025-06-13T00:00:00Z","related_material":{"record":[{"status":"public","relation":"part_of_dissertation","id":"19424"}]},"publication_identifier":{"issn":["2663-337X"]},"ddc":["530","539"],"date_created":"2025-06-13T09:01:50Z","author":[{"full_name":"Saez Mollejo, Jaime","last_name":"Saez Mollejo","first_name":"Jaime","id":"e0390f72-f6e0-11ea-865d-862393336714"}],"OA_place":"publisher","publisher":"Institute of Science and Technology Austria","year":"2025"},{"file_date_updated":"2024-07-22T11:56:08Z","volume":174,"day":"20","month":"05","language":[{"iso":"eng"}],"OA_type":"hybrid","project":[{"name":"Integrated Germanium Quantum Technology","grant_number":"101069515","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"}],"type":"journal_article","_id":"15018","doi":"10.1016/j.mssp.2024.108231","abstract":[{"lang":"eng","text":"The epitaxial growth of a strained Ge layer, which is a promising candidate for the channel material of a hole spin qubit, has been demonstrated on 300 mm Si wafers using commercially available Si0.3Ge0.7 strain relaxed buffer (SRB) layers. The assessment of the layer and the interface qualities for a buried strained Ge layer embedded in Si0.3Ge0.7 layers is reported. The XRD reciprocal space mapping confirmed that the reduction of the growth temperature enables the 2-dimensional growth of the Ge layer fully strained with respect to the Si0.3Ge0.7. Nevertheless, dislocations at the top and/or bottom interface of the Ge layer were observed by means of electron channeling contrast imaging, suggesting the importance of the careful dislocation assessment. The interface abruptness does not depend on the selection of the precursor gases, but it is strongly influenced by the growth temperature which affects the coverage of the surface H-passivation. The mobility of 2.7 × 105 cm2/Vs is promising, while the low percolation density of 3 × 1010 /cm2 measured with a Hall-bar device at 7 K illustrates the high quality of the heterostructure thanks to the high Si0.3Ge0.7 SRB quality."}],"article_processing_charge":"Yes (in subscription journal)","oa_version":"Published Version","publication":"Materials Science in Semiconductor Processing","date_updated":"2025-04-14T08:01:27Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"acknowledgement":"The Ge project received funding from the European Union's Horizon Europe programme under the Grant Agreement 101069515 – IGNITE. Siltronic AG is acknowledged for providing the SRB wafers. This work was supported by Imec's Industrial Affiliation Program on Quantum Computing.","citation":{"mla":"Shimura, Yosuke, et al. “Compressively Strained Epitaxial Ge Layers for Quantum Computing Applications.” <i>Materials Science in Semiconductor Processing</i>, vol. 174, no. 5, 108231, Elsevier, 2024, doi:<a href=\"https://doi.org/10.1016/j.mssp.2024.108231\">10.1016/j.mssp.2024.108231</a>.","chicago":"Shimura, Yosuke, Clement Godfrin, Andriy Hikavyy, Roy Li, Juan L Aguilera Servin, Georgios Katsaros, Paola Favia, et al. “Compressively Strained Epitaxial Ge Layers for Quantum Computing Applications.” <i>Materials Science in Semiconductor Processing</i>. Elsevier, 2024. <a href=\"https://doi.org/10.1016/j.mssp.2024.108231\">https://doi.org/10.1016/j.mssp.2024.108231</a>.","ama":"Shimura Y, Godfrin C, Hikavyy A, et al. Compressively strained epitaxial Ge layers for quantum computing applications. <i>Materials Science in Semiconductor Processing</i>. 2024;174(5). doi:<a href=\"https://doi.org/10.1016/j.mssp.2024.108231\">10.1016/j.mssp.2024.108231</a>","ieee":"Y. Shimura <i>et al.</i>, “Compressively strained epitaxial Ge layers for quantum computing applications,” <i>Materials Science in Semiconductor Processing</i>, vol. 174, no. 5. Elsevier, 2024.","short":"Y. Shimura, C. Godfrin, A. Hikavyy, R. Li, J.L. Aguilera Servin, G. Katsaros, P. Favia, H. Han, D. Wan, K. de Greve, R. Loo, Materials Science in Semiconductor Processing 174 (2024).","apa":"Shimura, Y., Godfrin, C., Hikavyy, A., Li, R., Aguilera Servin, J. L., Katsaros, G., … Loo, R. (2024). Compressively strained epitaxial Ge layers for quantum computing applications. <i>Materials Science in Semiconductor Processing</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.mssp.2024.108231\">https://doi.org/10.1016/j.mssp.2024.108231</a>","ista":"Shimura Y, Godfrin C, Hikavyy A, Li R, Aguilera Servin JL, Katsaros G, Favia P, Han H, Wan D, de Greve K, Loo R. 2024. Compressively strained epitaxial Ge layers for quantum computing applications. Materials Science in Semiconductor Processing. 174(5), 108231."},"date_published":"2024-05-20T00:00:00Z","issue":"5","title":"Compressively strained epitaxial Ge layers for quantum computing applications","scopus_import":"1","article_type":"original","intvolume":"       174","year":"2024","keyword":["Mechanical Engineering","Mechanics of Materials","Condensed Matter Physics","General Materials Science"],"author":[{"first_name":"Yosuke","full_name":"Shimura, Yosuke","last_name":"Shimura"},{"first_name":"Clement","last_name":"Godfrin","full_name":"Godfrin, Clement"},{"first_name":"Andriy","last_name":"Hikavyy","full_name":"Hikavyy, Andriy"},{"full_name":"Li, Roy","last_name":"Li","first_name":"Roy"},{"full_name":"Aguilera Servin, Juan L","orcid":"0000-0002-2862-8372","last_name":"Aguilera Servin","id":"2A67C376-F248-11E8-B48F-1D18A9856A87","first_name":"Juan L"},{"last_name":"Katsaros","full_name":"Katsaros, Georgios","orcid":"0000-0001-8342-202X","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios"},{"full_name":"Favia, Paola","last_name":"Favia","first_name":"Paola"},{"first_name":"Han","last_name":"Han","full_name":"Han, Han"},{"first_name":"Danny","last_name":"Wan","full_name":"Wan, Danny"},{"first_name":"Kristiaan","full_name":"de Greve, Kristiaan","last_name":"de Greve"},{"full_name":"Loo, Roger","last_name":"Loo","first_name":"Roger"}],"OA_place":"publisher","publisher":"Elsevier","ddc":["530"],"isi":1,"quality_controlled":"1","date_created":"2024-02-22T14:10:40Z","publication_identifier":{"issn":["1369-8001"]},"file":[{"access_level":"open_access","date_updated":"2024-07-22T11:56:08Z","file_id":"17312","date_created":"2024-07-22T11:56:08Z","file_name":"2024_MaterialsScience_Shimura.pdf","content_type":"application/pdf","success":1,"relation":"main_file","file_size":4220165,"creator":"dernst","checksum":"62e8e9ae960387a3dca32ec7f5e413ab"}],"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","article_number":"108231","department":[{"_id":"GeKa"},{"_id":"NanoFab"}],"has_accepted_license":"1","external_id":{"isi":["001188520000001"]},"publication_status":"published"},{"file_date_updated":"2024-12-16T11:13:48Z","volume":22,"day":"01","language":[{"iso":"eng"}],"month":"12","_id":"18653","abstract":[{"lang":"eng","text":"Charge sensing is a sensitive technique for probing quantum devices, of particular importance for spin-qubit readout. To achieve good readout sensitivities, the proximity of the charge sensor to the device to be measured is a necessity. However, this proximity also means that the operation of the device affects, in turn, the sensor tuning and ultimately the readout sensitivity. We present an approach for compensating for this crosstalk effect allowing for the gate voltages of the measured device to be swept in a 1-V × 1-V window while maintaining a sensor configuration chosen by a Bayesian optimizer. Our algorithm will hopefully be a major contribution to the suite of fully automated solutions required for the operation of large quantum device architectures."}],"doi":"10.1103/PhysRevApplied.22.064026","oa_version":"Published Version","article_processing_charge":"No","OA_type":"hybrid","type":"journal_article","project":[{"_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1","name":"High impedance circuit quantum electrodynamics with hole spins","grant_number":"I05060"},{"_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452","grant_number":"101069515","name":"Integrated Germanium Quantum Technology"}],"publication":"Physical Review Applied","oa":1,"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","acknowledgement":"We thank Nicholas Sim for providing help with the experiment and Sebastian Orbell for helpful discussions. This work was supported by the Royal Society, the Engineering and Physical Sciences Research Council (EPSRC) National Quantum Technology Hub in Networked Quantum Information Technology (Grant No. EP/M013243/1), Quantum Technology Capital (Grant No. EP/N014995/1), the EPSRC Platform Grant (Grant No. EP/R029229/1), the European Research Council (Grant Agreement No. 948932), the Scientific Service Units of the Institute of Science and Technology Austria through resources provided by the nanofabrication facility and, the FWF-I 05060 and HORIZON-RIA 101069515 projects.","date_updated":"2025-09-09T11:47:52Z","citation":{"mla":"Hickie, Joseph, et al. “Automated Long-Range Compensation of an Rf Quantum Dot Sensor.” <i>Physical Review Applied</i>, vol. 22, no. 6, 064026, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.22.064026\">10.1103/PhysRevApplied.22.064026</a>.","chicago":"Hickie, Joseph, Barnaby Van Straaten, Federico Fedele, Daniel Jirovec, Andrea Ballabio, Daniel Chrastina, Giovanni Isella, Georgios Katsaros, and Natalia Ares. “Automated Long-Range Compensation of an Rf Quantum Dot Sensor.” <i>Physical Review Applied</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/PhysRevApplied.22.064026\">https://doi.org/10.1103/PhysRevApplied.22.064026</a>.","ama":"Hickie J, Van Straaten B, Fedele F, et al. Automated long-range compensation of an rf quantum dot sensor. <i>Physical Review Applied</i>. 2024;22(6). doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.22.064026\">10.1103/PhysRevApplied.22.064026</a>","ieee":"J. Hickie <i>et al.</i>, “Automated long-range compensation of an rf quantum dot sensor,” <i>Physical Review Applied</i>, vol. 22, no. 6. American Physical Society, 2024.","short":"J. Hickie, B. Van Straaten, F. Fedele, D. Jirovec, A. Ballabio, D. Chrastina, G. Isella, G. Katsaros, N. Ares, Physical Review Applied 22 (2024).","apa":"Hickie, J., Van Straaten, B., Fedele, F., Jirovec, D., Ballabio, A., Chrastina, D., … Ares, N. (2024). Automated long-range compensation of an rf quantum dot sensor. <i>Physical Review Applied</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevApplied.22.064026\">https://doi.org/10.1103/PhysRevApplied.22.064026</a>","ista":"Hickie J, Van Straaten B, Fedele F, Jirovec D, Ballabio A, Chrastina D, Isella G, Katsaros G, Ares N. 2024. Automated long-range compensation of an rf quantum dot sensor. Physical Review Applied. 22(6), 064026."},"date_published":"2024-12-01T00:00:00Z","scopus_import":"1","article_type":"original","acknowledged_ssus":[{"_id":"NanoFab"}],"issue":"6","title":"Automated long-range compensation of an rf quantum dot sensor","author":[{"first_name":"Joseph","last_name":"Hickie","full_name":"Hickie, Joseph"},{"first_name":"Barnaby","full_name":"Van Straaten, Barnaby","last_name":"Van Straaten"},{"first_name":"Federico","last_name":"Fedele","full_name":"Fedele, Federico"},{"full_name":"Jirovec, Daniel","orcid":"0000-0002-7197-4801","last_name":"Jirovec","first_name":"Daniel","id":"4C473F58-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Ballabio","full_name":"Ballabio, Andrea","first_name":"Andrea"},{"first_name":"Daniel","last_name":"Chrastina","full_name":"Chrastina, Daniel"},{"last_name":"Isella","full_name":"Isella, Giovanni","first_name":"Giovanni"},{"full_name":"Katsaros, Georgios","last_name":"Katsaros","orcid":"0000-0001-8342-202X","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios"},{"last_name":"Ares","full_name":"Ares, Natalia","first_name":"Natalia"}],"OA_place":"publisher","publisher":"American Physical Society","intvolume":"        22","year":"2024","publication_identifier":{"eissn":["2331-7019"]},"ddc":["530"],"quality_controlled":"1","isi":1,"date_created":"2024-12-15T23:01:50Z","file":[{"file_id":"18662","date_updated":"2024-12-16T11:13:48Z","access_level":"open_access","content_type":"application/pdf","success":1,"file_name":"2024_PhysicalReviewApplied_Hickie.pdf","date_created":"2024-12-16T11:13:48Z","relation":"main_file","checksum":"bc29a40819abc4969867b6cd6563f7ad","creator":"dernst","file_size":3560132}],"status":"public","article_number":"064026","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"publication_status":"published","external_id":{"isi":["001379155900003"]},"department":[{"_id":"GeKa"}],"has_accepted_license":"1"},{"file_date_updated":"2024-01-17T11:03:00Z","volume":15,"day":"02","language":[{"iso":"eng"}],"month":"01","OA_type":"gold","project":[{"call_identifier":"H2020","grant_number":"862046","name":"TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS","_id":"237E5020-32DE-11EA-91FC-C7463DDC885E"},{"name":"Integrated Germanium Quantum Technology","grant_number":"101069515","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"grant_number":"101115315","name":"Quantum bits with Kitaev Transmons","_id":"bdc2ca30-d553-11ed-ba76-cf164a5bb811"},{"grant_number":"P32235","name":"Towards scalable hut wire quantum devices","call_identifier":"FWF","_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E"},{"_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a","grant_number":"P36507","name":"Merging spin and superconducting qubits in planar Ge"},{"_id":"34a66131-11ca-11ed-8bc3-a31681c6b03e","name":"Center for Correlated Quantum Materials and Solid State Quantum Systems: Conventional  and unconventional topological superconductors","grant_number":"F8606"},{"_id":"3AC91DDA-15DF-11EA-824D-93A3E7B544D1","name":"FWF Open Access Fund","call_identifier":"FWF"}],"type":"journal_article","_id":"14793","doi":"10.1038/s41467-023-44114-0","abstract":[{"lang":"eng","text":"Superconductor/semiconductor hybrid devices have attracted increasing interest in the past years. Superconducting electronics aims to complement semiconductor technology, while hybrid architectures are at the forefront of new ideas such as topological superconductivity and protected qubits. In this work, we engineer the induced superconductivity in two-dimensional germanium hole gas by varying the distance between the quantum well and the aluminum. We demonstrate a hard superconducting gap and realize an electrically and flux tunable superconducting diode using a superconducting quantum interference device (SQUID). This allows to tune the current phase relation (CPR), to a regime where single Cooper pair tunneling is suppressed, creating a sin(2y) CPR. Shapiro experiments complement this interpretation and the microwave drive allows to create a diode with ≈ 100% efficiency. The reported results open up the path towards integration of spin qubit devices, microwave resonators and (protected) superconducting qubits on  the same silicon technology compatible platform."}],"oa_version":"Published Version","article_processing_charge":"Yes","publication":"Nature Communications","date_updated":"2026-07-29T07:04:56Z","acknowledgement":"We acknowledge Alexander Brinkmann, Alessandro Crippa, Francesco Giazotto, Andrew Higginbotham, Andrea Iorio, Giordano Scappucci, Christian Schonenberger, and Lukas Splitthoff for helpful discussions. We thank Marcel Verheijen for the support in the TEM analysis. This research and related results were made possible with the support of the NOMIS\r\nFoundation. It was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the nanofabrication facility, the European Union’s Horizon 2020 research andinnovation programme under Grant Agreement No 862046, the HORIZONRIA\r\n101069515 project, the European Innovation Council Pathfinder grant no. 101115315 (QuKiT), and the FWF Projects #P-32235, #P-36507 and #F-8606. For the purpose of open access, the authors have applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission. R.S.S. acknowledges Spanish CM “Talento Program\"\r\nProject No. 2022-T1/IND-24070. J.J. acknowledges European Research Council TOCINA 834290.","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"citation":{"chicago":"Valentini, Marco, Oliver Sagi, Levon Baghumyan, Thijs de Gijsel, Jason Jung, Stefano Calcaterra, Andrea Ballabio, et al. “Parity-Conserving Cooper-Pair Transport and Ideal Superconducting Diode in Planar Germanium.” <i>Nature Communications</i>. Springer Nature, 2024. <a href=\"https://doi.org/10.1038/s41467-023-44114-0\">https://doi.org/10.1038/s41467-023-44114-0</a>.","mla":"Valentini, Marco, et al. “Parity-Conserving Cooper-Pair Transport and Ideal Superconducting Diode in Planar Germanium.” <i>Nature Communications</i>, vol. 15, 169, Springer Nature, 2024, doi:<a href=\"https://doi.org/10.1038/s41467-023-44114-0\">10.1038/s41467-023-44114-0</a>.","ama":"Valentini M, Sagi O, Baghumyan L, et al. Parity-conserving Cooper-pair transport and ideal superconducting diode in planar germanium. <i>Nature Communications</i>. 2024;15. doi:<a href=\"https://doi.org/10.1038/s41467-023-44114-0\">10.1038/s41467-023-44114-0</a>","ieee":"M. Valentini <i>et al.</i>, “Parity-conserving Cooper-pair transport and ideal superconducting diode in planar germanium,” <i>Nature Communications</i>, vol. 15. Springer Nature, 2024.","ista":"Valentini M, Sagi O, Baghumyan L, de Gijsel T, Jung J, Calcaterra S, Ballabio A, Aguilera Servin JL, Aggarwal K, Janik M, Adletzberger T, Seoane Souto R, Leijnse M, Danon J, Schrade C, Bakkers E, Chrastina D, Isella G, Katsaros G. 2024. Parity-conserving Cooper-pair transport and ideal superconducting diode in planar germanium. Nature Communications. 15, 169.","apa":"Valentini, M., Sagi, O., Baghumyan, L., de Gijsel, T., Jung, J., Calcaterra, S., … Katsaros, G. (2024). Parity-conserving Cooper-pair transport and ideal superconducting diode in planar germanium. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-023-44114-0\">https://doi.org/10.1038/s41467-023-44114-0</a>","short":"M. Valentini, O. Sagi, L. Baghumyan, T. de Gijsel, J. Jung, S. Calcaterra, A. Ballabio, J.L. Aguilera Servin, K. Aggarwal, M. Janik, T. Adletzberger, R. Seoane Souto, M. Leijnse, J. Danon, C. Schrade, E. Bakkers, D. Chrastina, G. Isella, G. Katsaros, Nature Communications 15 (2024)."},"related_material":{"record":[{"id":"13312","relation":"earlier_version","status":"public"}]},"date_published":"2024-01-02T00:00:00Z","title":"Parity-conserving Cooper-pair transport and ideal superconducting diode in planar germanium","article_type":"original","scopus_import":"1","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"intvolume":"        15","year":"2024","author":[{"id":"C0BB2FAC-D767-11E9-B658-BC13E6697425","first_name":"Marco","full_name":"Valentini, Marco","last_name":"Valentini"},{"full_name":"Sagi, Oliver","last_name":"Sagi","id":"71616374-A8E9-11E9-A7CA-09ECE5697425","first_name":"Oliver"},{"first_name":"Levon","id":"7aa1f788-b527-11ee-aa9e-e6111a79e0c7","last_name":"Baghumyan","full_name":"Baghumyan, Levon"},{"id":"a0ece13c-b527-11ee-929d-bad130106eee","first_name":"Thijs","full_name":"de Gijsel, Thijs","last_name":"de Gijsel"},{"last_name":"Jung","full_name":"Jung, Jason","id":"4C9ACE7A-F248-11E8-B48F-1D18A9856A87","first_name":"Jason"},{"first_name":"Stefano","full_name":"Calcaterra, Stefano","last_name":"Calcaterra"},{"full_name":"Ballabio, Andrea","last_name":"Ballabio","first_name":"Andrea"},{"id":"2A67C376-F248-11E8-B48F-1D18A9856A87","first_name":"Juan L","last_name":"Aguilera Servin","full_name":"Aguilera Servin, Juan L","orcid":"0000-0002-2862-8372"},{"orcid":"0000-0001-9985-9293","last_name":"Aggarwal","full_name":"Aggarwal, Kushagra","first_name":"Kushagra","id":"b22ab905-3539-11eb-84c3-fc159dcd79cb"},{"first_name":"Marian","id":"396A1950-F248-11E8-B48F-1D18A9856A87","last_name":"Janik","orcid":"0009-0003-9037-8831","full_name":"Janik, Marian"},{"full_name":"Adletzberger, Thomas","last_name":"Adletzberger","id":"38756BB2-F248-11E8-B48F-1D18A9856A87","first_name":"Thomas"},{"last_name":"Seoane Souto","full_name":"Seoane Souto, Rubén","first_name":"Rubén"},{"full_name":"Leijnse, Martin","last_name":"Leijnse","first_name":"Martin"},{"last_name":"Danon","full_name":"Danon, Jeroen","first_name":"Jeroen"},{"first_name":"Constantin","last_name":"Schrade","full_name":"Schrade, Constantin"},{"first_name":"Erik","full_name":"Bakkers, Erik","last_name":"Bakkers"},{"full_name":"Chrastina, Daniel","last_name":"Chrastina","first_name":"Daniel"},{"last_name":"Isella","full_name":"Isella, Giovanni","first_name":"Giovanni"},{"first_name":"Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8342-202X","last_name":"Katsaros","full_name":"Katsaros, Georgios"}],"OA_place":"publisher","publisher":"Springer Nature","ddc":["530"],"DOAJ_listed":"1","date_created":"2024-01-14T23:00:56Z","isi":1,"quality_controlled":"1","pmid":1,"publication_identifier":{"eissn":["2041-1723"]},"ec_funded":1,"APC_amount":"6468 EUR","file":[{"file_id":"14825","date_updated":"2024-01-17T11:03:00Z","access_level":"open_access","file_name":"2024_NatureComm_Valentini.pdf","content_type":"application/pdf","success":1,"date_created":"2024-01-17T11:03:00Z","relation":"main_file","file_size":2336595,"creator":"dernst","checksum":"ef79173b45eeaf984ffa61ef2f8a52ab"}],"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"status":"public","article_number":"169","department":[{"_id":"GeKa"}],"has_accepted_license":"1","corr_author":"1","external_id":{"pmid":["38167818"],"isi":["001142794000839"]},"publication_status":"published"},{"day":"24","degree_awarded":"PhD","month":"09","language":[{"iso":"eng"}],"file_date_updated":"2025-05-23T22:30:09Z","date_updated":"2026-06-03T07:16:03Z","oa":1,"user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","page":"164","citation":{"short":"M. Janik, Strong Charge-Photon Coupling in Germanium Enabled by Granular Aluminium Superinductors, Institute of Science and Technology Austria, 2024.","ista":"Janik M. 2024. Strong charge-photon coupling in Germanium enabled by granular aluminium superinductors. Institute of Science and Technology Austria.","apa":"Janik, M. (2024). <i>Strong charge-photon coupling in Germanium enabled by granular aluminium superinductors</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/at:ista:18129\">https://doi.org/10.15479/at:ista:18129</a>","ieee":"M. Janik, “Strong charge-photon coupling in Germanium enabled by granular aluminium superinductors,” Institute of Science and Technology Austria, 2024.","ama":"Janik M. Strong charge-photon coupling in Germanium enabled by granular aluminium superinductors. 2024. doi:<a href=\"https://doi.org/10.15479/at:ista:18129\">10.15479/at:ista:18129</a>","mla":"Janik, Marian. <i>Strong Charge-Photon Coupling in Germanium Enabled by Granular Aluminium Superinductors</i>. Institute of Science and Technology Austria, 2024, doi:<a href=\"https://doi.org/10.15479/at:ista:18129\">10.15479/at:ista:18129</a>.","chicago":"Janik, Marian. “Strong Charge-Photon Coupling in Germanium Enabled by Granular Aluminium Superinductors.” Institute of Science and Technology Austria, 2024. <a href=\"https://doi.org/10.15479/at:ista:18129\">https://doi.org/10.15479/at:ista:18129</a>."},"project":[{"grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins","_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1"},{"_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a","grant_number":"P36507","name":"Merging spin and superconducting qubits in planar Ge"},{"_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E","grant_number":"P32235","name":"Towards scalable hut wire quantum devices","call_identifier":"FWF"},{"_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452","name":"Integrated Germanium Quantum Technology","grant_number":"101069515"},{"name":"Protected states of quantum matter","_id":"eb9b30ac-77a9-11ec-83b8-871f581d53d2"}],"type":"dissertation","_id":"18129","doi":"10.15479/at:ista:18129","abstract":[{"lang":"eng","text":"State-of-the-art quantum computers, with roughly a thousand qubits, face a crucial technological challenge of scaling up. Spins confined in quantum dots (QDs) are a promising candidate\r\nfor qubits due to their long coherence, tunability, control, and readout. However, their natural\r\ncoupling is the short-ranged (∼ 100 nm) exchange interaction, limited to nearest neighbours.\r\nLong-ranged (∼ 1 mm) qubit interactions mediated by a photon could be engineered through a\r\ncoherent spin-photon coupling. Achieving a strong coupling to a photon is inherently challenging in QDs due to the small dipole moment of the confined charge. However, the potential of\r\nhigh-impedance resonators to compensate for this has gained significant attention in the past\r\ndecade. Nevertheless, previous QD circuit quantum electrodynamics implementations have not\r\nexceeded the impedance of ∼ 3.8 kΩ, leaving opportunities for significant improvement. The\r\nlarge kinetic inductance of granular aluminium (grAl) could provide an order-of-magnitude\r\nenhancement. However, fully exploiting the potential of disordered or granular superconductors\r\nis challenging as their impedances close to the superconductor-to-insulator transition are\r\ndifficult to control reproducibly. We report on the realization of a wireless ohmmeter which\r\nallows in situ resistance measurements during film deposition and, therefore, indirect control\r\nof the kinetic inductance of grAl films. This allows us to reproducibly fabricate resonators\r\nwith characteristic impedance exceeding the resistance quantum, even reaching 22.3 kW, due\r\nto the large sheet kinetic inductance of up to 3 nH □−1\r\n. By integrating an 8 kW resonator\r\nwith a germanium double QD, we demonstrate a strong charge-photon coupling with the\r\nhighest rate reported, 566 MHz. The demonstrated method and grAl properties make these\r\nresonators suitable for boosting the spin-photon coupling strength, a crucial requirement for\r\nfast, high-fidelity, long-distance two-qubit gates.\r\n"}],"oa_version":"Published Version","article_processing_charge":"No","supervisor":[{"id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios","orcid":"0000-0001-8342-202X","last_name":"Katsaros","full_name":"Katsaros, Georgios"}],"year":"2024","OA_place":"publisher","author":[{"id":"396A1950-F248-11E8-B48F-1D18A9856A87","first_name":"Marian","full_name":"Janik, Marian","last_name":"Janik","orcid":"0009-0003-9037-8831"}],"publisher":"Institute of Science and Technology Austria","ddc":["539"],"date_created":"2024-09-23T17:25:43Z","publication_identifier":{"issn":["2663-337X"]},"related_material":{"record":[{"relation":"part_of_dissertation","id":"18144","status":"public"}]},"date_published":"2024-09-24T00:00:00Z","title":"Strong charge-photon coupling in Germanium enabled by granular aluminium superinductors","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"department":[{"_id":"GradSch"},{"_id":"GeKa"}],"has_accepted_license":"1","publication_status":"published","corr_author":"1","file":[{"creator":"mjanik","checksum":"dc15958f6400b5bdaa28bf58fc7a4056","file_size":156207943,"relation":"source_file","date_created":"2024-09-23T17:15:09Z","content_type":"application/x-zip-compressed","file_name":"janik_thesis.zip","date_updated":"2025-05-23T22:30:09Z","access_level":"closed","embargo_to":"open_access","file_id":"18130"},{"embargo":"2025-05-23","file_size":96195684,"creator":"mjanik","checksum":"74737aee285dc1f491643327350efe9c","relation":"main_file","file_name":"janik_thesis_pdfa.pdf","content_type":"application/pdf","date_created":"2024-09-23T17:15:30Z","file_id":"18131","date_updated":"2025-05-23T22:30:09Z","access_level":"open_access"}],"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"alternative_title":["ISTA Thesis"],"status":"public"},{"date_created":"2024-09-26T09:50:43Z","year":"2024","author":[{"id":"396A1950-F248-11E8-B48F-1D18A9856A87","first_name":"Marian","last_name":"Janik","orcid":"0009-0003-9037-8831","full_name":"Janik, Marian"},{"id":"53f93ea2-803f-11ed-ab7e-b283135794ef","first_name":"Kevin Etienne Robert","last_name":"Roux","full_name":"Roux, Kevin Etienne Robert"},{"first_name":"Carla N","id":"18777c01-896a-11ed-bdf8-e4851dc07d16","full_name":"Borja Espinosa, Carla N","last_name":"Borja Espinosa"},{"id":"71616374-A8E9-11E9-A7CA-09ECE5697425","first_name":"Oliver","last_name":"Sagi","full_name":"Sagi, Oliver"},{"last_name":"Baghdadi","full_name":"Baghdadi, Abdulhamid","first_name":"Abdulhamid","id":"160D87FA-96B5-11E9-BF77-7626E6697425"},{"first_name":"Thomas","id":"38756BB2-F248-11E8-B48F-1D18A9856A87","full_name":"Adletzberger, Thomas","last_name":"Adletzberger"},{"first_name":"Stefano","last_name":"Calcaterra","full_name":"Calcaterra, Stefano"},{"last_name":"Botifoll","full_name":"Botifoll, Marc","first_name":"Marc"},{"last_name":"Manjón","full_name":"Manjón, Alba Garzón","first_name":"Alba Garzón"},{"full_name":"Arbiol, Jordi","last_name":"Arbiol","first_name":"Jordi"},{"full_name":"Chrastina, Daniel","last_name":"Chrastina","first_name":"Daniel"},{"first_name":"Giovanni","full_name":"Isella, Giovanni","last_name":"Isella"},{"first_name":"Ioan M.","last_name":"Pop","full_name":"Pop, Ioan M."},{"last_name":"Katsaros","full_name":"Katsaros, Georgios","orcid":"0000-0001-8342-202X","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios"}],"OA_place":"repository","title":"Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2407.03079","open_access":"1"}],"acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"related_material":{"record":[{"status":"public","relation":"research_data","id":"18886"},{"id":"19401","relation":"later_version","status":"public"},{"status":"public","relation":"dissertation_contains","id":"18129"}]},"date_published":"2024-07-03T00:00:00Z","department":[{"_id":"GeKa"},{"_id":"GradSch"},{"_id":"JoFi"}],"external_id":{"arxiv":["2407.03079"]},"publication_status":"draft","corr_author":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"article_number":"2407.03079","status":"public","arxiv":1,"language":[{"iso":"eng"}],"month":"07","day":"03","citation":{"ista":"Janik M, Roux KER, Borja Espinosa CN, Sagi O, Baghdadi A, Adletzberger T, Calcaterra S, Botifoll M, Manjón AG, Arbiol J, Chrastina D, Isella G, Pop IM, Katsaros G. Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors. arXiv, 2407.03079.","apa":"Janik, M., Roux, K. E. R., Borja Espinosa, C. N., Sagi, O., Baghdadi, A., Adletzberger, T., … Katsaros, G. (n.d.). Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors. <i>arXiv</i>. <a href=\"https://doi.org/10.48550/arXiv.2407.03079\">https://doi.org/10.48550/arXiv.2407.03079</a>","short":"M. Janik, K.E.R. Roux, C.N. Borja Espinosa, O. Sagi, A. Baghdadi, T. Adletzberger, S. Calcaterra, M. Botifoll, A.G. Manjón, J. Arbiol, D. Chrastina, G. Isella, I.M. Pop, G. Katsaros, ArXiv (n.d.).","ieee":"M. Janik <i>et al.</i>, “Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors,” <i>arXiv</i>. .","ama":"Janik M, Roux KER, Borja Espinosa CN, et al. Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors. <i>arXiv</i>. doi:<a href=\"https://doi.org/10.48550/arXiv.2407.03079\">10.48550/arXiv.2407.03079</a>","chicago":"Janik, Marian, Kevin Etienne Robert Roux, Carla N Borja Espinosa, Oliver Sagi, Abdulhamid Baghdadi, Thomas Adletzberger, Stefano Calcaterra, et al. “Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular  Aluminium Superinductors.” <i>ArXiv</i>, n.d. <a href=\"https://doi.org/10.48550/arXiv.2407.03079\">https://doi.org/10.48550/arXiv.2407.03079</a>.","mla":"Janik, Marian, et al. “Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular  Aluminium Superinductors.” <i>ArXiv</i>, 2407.03079, doi:<a href=\"https://doi.org/10.48550/arXiv.2407.03079\">10.48550/arXiv.2407.03079</a>."},"date_updated":"2026-08-22T22:30:53Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","acknowledgement":"We acknowledge Franco De Palma, Mahya Khorramshahi, Fabian Oppliger, Thomas Reisinger, Pasquale Scarlino and Xiao Xue for helpful discussions. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the Nanofabrication facility. This research and related results were made possible with the support of the NOMIS Foundation, the HORIZON-RIA 101069515 project, the FWF Projects with DOI:10.55776/P32235, DOI:10.55776/I5060 and DOI:10.55776/P36507. IMP acknowledges funding from the Deutsche Forschungsgemeinschaft (DFG – German Research Foundation) under project number 450396347 (GeHoldeQED). ICN2 acknowledges funding from Generalitat de Catalunya 2021SGR00457. We acknowledge support from CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+). This research work has been funded by the European Commission – NextGenerationEU (Regulation EU 2020/2094), through CSIC’s\r\nQuantum Technologies Platform (QTEP). ICN2 is supported by the Severo Ochoa program from Spanish MCIN/AEI (Grant No.: CEX2021-001214-S) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD program. AGM has received funding from Grant RYC2021-033479-I funded by MCIN/AEI/10.13039/501100011033 and by European Union NextGenerationEU/PRTR. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. The authors\r\nacknowledge the use of instrumentation and the technical advice provided by the Joint Electron Microscopy Center at ALBA (JEMCA). ICN2 acknowledges funding from Grant IU16-014206 (METCAM-FIB) funded by the European Union through the European Regional Development\r\nFund (ERDF), with the support of the Ministry of Research and Universities, Generalitat de Catalunya. ICN2 is a founding member of e-DREAM [60].","oa":1,"publication":"arXiv","type":"preprint","project":[{"grant_number":"101069515","name":"Integrated Germanium Quantum Technology","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"call_identifier":"FWF","name":"Towards scalable hut wire quantum devices","grant_number":"P32235","_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E"},{"_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a","name":"Merging spin and superconducting qubits in planar Ge","grant_number":"P36507"},{"_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1","grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins"}],"oa_version":"Preprint","article_processing_charge":"No","abstract":[{"lang":"eng","text":"High kinetic inductance superconductors are gaining increasing interest for\r\nthe realisation of qubits, amplifiers and detectors. Moreover, thanks to their\r\nhigh impedance, quantum buses made of such materials enable large zero-point\r\nfluctuations of the voltage, boosting the coupling rates to spin and charge\r\nqubits. However, fully exploiting the potential of disordered or granular\r\nsuperconductors is challenging, as their inductance and, therefore, impedance\r\nat high values are difficult to control. Here we have integrated a granular\r\naluminium resonator, having a characteristic impedance exceeding the resistance\r\nquantum, with a germanium double quantum dot and demonstrate strong\r\ncharge-photon coupling with a rate of $g_\\text{c}/2\\pi= (566 \\pm 2)$ MHz. This\r\nwas achieved due to the realisation of a wireless ohmmeter, which allows\r\n\\emph{in situ} measurements during film deposition and, therefore, control of\r\nthe kinetic inductance of granular aluminium films. Reproducible fabrication of\r\ncircuits with impedances (inductances) exceeding 13 k$\\Omega$ (1 nH per square)\r\nis now possible. This broadly applicable method opens the path for novel qubits\r\nand high-fidelity, long-distance two-qubit gates."}],"_id":"18144","doi":"10.48550/arXiv.2407.03079"}]