[{"publication":"arXiv","citation":{"short":"M. Valentini, O. Sagi, L. Baghumyan, T. de Gijsel, J. Jung, S. Calcaterra, A. Ballabio, J.A. Servin, K. Aggarwal, M. Janik, T. Adletzberger, R.S. Souto, M. Leijnse, J. Danon, C. Schrade, E. Bakkers, D. Chrastina, G. Isella, G. Katsaros, ArXiv (n.d.).","mla":"Valentini, Marco, et al. “Radio Frequency Driven Superconducting Diode and Parity Conserving Cooper Pair Transport in a Two-Dimensional Germanium Hole Gas.” ArXiv, 2306.07109, doi:10.48550/arXiv.2306.07109.","chicago":"Valentini, Marco, Oliver Sagi, Levon Baghumyan, Thijs de Gijsel, Jason Jung, Stefano Calcaterra, Andrea Ballabio, et al. “Radio Frequency Driven Superconducting Diode and Parity Conserving Cooper Pair Transport in a Two-Dimensional Germanium Hole Gas.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2306.07109.","ama":"Valentini M, Sagi O, Baghumyan L, et al. Radio frequency driven superconducting diode and parity conserving Cooper pair transport in a two-dimensional germanium hole gas. arXiv. doi:10.48550/arXiv.2306.07109","apa":"Valentini, M., Sagi, O., Baghumyan, L., Gijsel, T. de, Jung, J., Calcaterra, S., … Katsaros, G. (n.d.). Radio frequency driven superconducting diode and parity conserving Cooper pair transport in a two-dimensional germanium hole gas. arXiv. https://doi.org/10.48550/arXiv.2306.07109","ieee":"M. Valentini et al., “Radio frequency driven superconducting diode and parity conserving Cooper pair transport in a two-dimensional germanium hole gas,” arXiv. .","ista":"Valentini M, Sagi O, Baghumyan L, Gijsel T de, Jung J, Calcaterra S, Ballabio A, Servin JA, Aggarwal K, Janik M, Adletzberger T, Souto RS, Leijnse M, Danon J, Schrade C, Bakkers E, Chrastina D, Isella G, Katsaros G. Radio frequency driven superconducting diode and parity conserving Cooper pair transport in a two-dimensional germanium hole gas. arXiv, 2306.07109."},"date_published":"2023-06-13T00:00:00Z","keyword":["Mesoscale and Nanoscale Physics"],"day":"13","article_processing_charge":"No","_id":"13312","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","status":"public","ddc":["530"],"title":"Radio frequency driven superconducting diode and parity conserving Cooper pair transport in a two-dimensional germanium hole gas","oa_version":"Preprint","type":"preprint","abstract":[{"lang":"eng","text":"Superconductor/semiconductor hybrid devices have attracted increasing\r\ninterest in the past years. Superconducting electronics aims to complement\r\nsemiconductor technology, while hybrid architectures are at the forefront of\r\nnew ideas such as topological superconductivity and protected qubits. In this\r\nwork, we engineer the induced superconductivity in two-dimensional germanium\r\nhole gas by varying the distance between the quantum well and the aluminum. We\r\ndemonstrate a hard superconducting gap and realize an electrically and flux\r\ntunable superconducting diode using a superconducting quantum interference\r\ndevice (SQUID). This allows to tune the current phase relation (CPR), to a\r\nregime where single Cooper pair tunneling is suppressed, creating a $ \\sin\r\n\\left( 2 \\varphi \\right)$ CPR. Shapiro experiments complement this\r\ninterpretation and the microwave drive allows to create a diode with $ \\approx\r\n100 \\%$ efficiency. The reported results open up the path towards monolithic\r\nintegration of spin qubit devices, microwave resonators and (protected)\r\nsuperconducting qubits on a silicon technology compatible platform."}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2306.07109"}],"external_id":{"arxiv":["2306.07109"]},"oa":1,"project":[{"name":"TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS","call_identifier":"H2020","grant_number":"862046","_id":"237E5020-32DE-11EA-91FC-C7463DDC885E"},{"call_identifier":"FWF","name":"Towards scalable hut wire quantum devices","grant_number":"P32235","_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E"},{"name":"Merging spin and superconducting qubits in planar Ge","grant_number":"P36507","_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a"},{"grant_number":"F8606","_id":"34a66131-11ca-11ed-8bc3-a31681c6b03e","name":"Conventional and unconventional topological superconductors"},{"name":"Protected states of quantum matter","_id":"bd5b4ec5-d553-11ed-ba76-a6eedb083344"}],"doi":"10.48550/arXiv.2306.07109","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"language":[{"iso":"eng"}],"month":"06","acknowledgement":"The authors acknowledge Alexander Brinkmann, Alessandro Crippa, Andrew Higginbotham, Andrea Iorio, Giordano\r\nScappucci and Christian Schonenberger for helpful discussions. We thank Marcel Verheijen for the support in the\r\nTEM analysis. This research and related results were made\r\npossible with the support of the NOMIS Foundation. It was\r\nsupported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the\r\nnanofabrication facility, the European Union’s Horizon 2020\r\nresearch and innovation programme under Grant Agreement\r\nNo 862046, the HORIZON-RIA 101069515 project and the\r\nFWF Projects #P-32235, #P-36507 and #F-8606. R.S.S.\r\nacknowledges Spanish CM “Talento Program” Project No.\r\n2022-T1/IND-24070.","year":"2023","publication_status":"submitted","department":[{"_id":"GeKa"},{"_id":"M-Shop"}],"author":[{"full_name":"Valentini, Marco","id":"C0BB2FAC-D767-11E9-B658-BC13E6697425","last_name":"Valentini","first_name":"Marco"},{"id":"71616374-A8E9-11E9-A7CA-09ECE5697425","first_name":"Oliver","last_name":"Sagi","full_name":"Sagi, Oliver"},{"last_name":"Baghumyan","first_name":"Levon","full_name":"Baghumyan, Levon"},{"full_name":"Gijsel, Thijs de","last_name":"Gijsel","first_name":"Thijs de"},{"full_name":"Jung, Jason","first_name":"Jason","last_name":"Jung","id":"4C9ACE7A-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Calcaterra","first_name":"Stefano","full_name":"Calcaterra, Stefano"},{"last_name":"Ballabio","first_name":"Andrea","full_name":"Ballabio, Andrea"},{"full_name":"Servin, Juan Aguilera","first_name":"Juan Aguilera","last_name":"Servin"},{"id":"b22ab905-3539-11eb-84c3-fc159dcd79cb","orcid":"0000-0001-9985-9293","first_name":"Kushagra","last_name":"Aggarwal","full_name":"Aggarwal, Kushagra"},{"id":"396A1950-F248-11E8-B48F-1D18A9856A87","last_name":"Janik","first_name":"Marian","full_name":"Janik, Marian"},{"full_name":"Adletzberger, Thomas","id":"38756BB2-F248-11E8-B48F-1D18A9856A87","first_name":"Thomas","last_name":"Adletzberger"},{"full_name":"Souto, Rubén Seoane","first_name":"Rubén Seoane","last_name":"Souto"},{"first_name":"Martin","last_name":"Leijnse","full_name":"Leijnse, Martin"},{"last_name":"Danon","first_name":"Jeroen","full_name":"Danon, Jeroen"},{"full_name":"Schrade, Constantin","first_name":"Constantin","last_name":"Schrade"},{"last_name":"Bakkers","first_name":"Erik","full_name":"Bakkers, Erik"},{"full_name":"Chrastina, Daniel","first_name":"Daniel","last_name":"Chrastina"},{"full_name":"Isella, Giovanni","last_name":"Isella","first_name":"Giovanni"},{"full_name":"Katsaros, Georgios","first_name":"Georgios","last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8342-202X"}],"related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"13286"}]},"date_created":"2023-07-26T11:17:20Z","date_updated":"2024-02-07T07:52:32Z","article_number":"2306.07109","ec_funded":1},{"ddc":["530"],"status":"public","title":"Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction","intvolume":" 2","_id":"9928","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","file":[{"success":1,"checksum":"36eb41ea43d8ca22b0efab12419e4eb2","date_created":"2022-01-18T11:29:33Z","date_updated":"2022-01-18T11:29:33Z","file_id":"10641","relation":"main_file","creator":"cchlebak","file_size":4247422,"content_type":"application/pdf","access_level":"open_access","file_name":"2021_PRXQuantum_Peruzzo.pdf"}],"oa_version":"Published Version","type":"journal_article","abstract":[{"lang":"eng","text":"There are two elementary superconducting qubit types that derive directly from the quantum harmonic oscillator. In one, the inductor is replaced by a nonlinear Josephson junction to realize the widely used charge qubits with a compact phase variable and a discrete charge wave function. In the other, the junction is added in parallel, which gives rise to an extended phase variable, continuous wave functions, and a rich energy-level structure due to the loop topology. While the corresponding rf superconducting quantum interference device Hamiltonian was introduced as a quadratic quasi-one-dimensional potential approximation to describe the fluxonium qubit implemented with long Josephson-junction arrays, in this work we implement it directly using a linear superinductor formed by a single uninterrupted aluminum wire. We present a large variety of qubits, all stemming from the same circuit but with drastically different characteristic energy scales. This includes flux and fluxonium qubits but also the recently introduced quasicharge qubit with strongly enhanced zero-point phase fluctuations and a heavily suppressed flux dispersion. The use of a geometric inductor results in high reproducibility of the inductive energy as guaranteed by top-down lithography—a key ingredient for intrinsically protected superconducting qubits."}],"issue":"4","article_type":"original","page":"040341","publication":"PRX Quantum","citation":{"ieee":"M. Peruzzo et al., “Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction,” PRX Quantum, vol. 2, no. 4. American Physical Society, p. 040341, 2021.","apa":"Peruzzo, M., Hassani, F., Szep, G., Trioni, A., Redchenko, E., Zemlicka, M., & Fink, J. M. (2021). Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. PRX Quantum. American Physical Society. https://doi.org/10.1103/PRXQuantum.2.040341","ista":"Peruzzo M, Hassani F, Szep G, Trioni A, Redchenko E, Zemlicka M, Fink JM. 2021. Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. PRX Quantum. 2(4), 040341.","ama":"Peruzzo M, Hassani F, Szep G, et al. Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. PRX Quantum. 2021;2(4):040341. doi:10.1103/PRXQuantum.2.040341","chicago":"Peruzzo, Matilda, Farid Hassani, Gregory Szep, Andrea Trioni, Elena Redchenko, Martin Zemlicka, and Johannes M Fink. “Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction.” PRX Quantum. American Physical Society, 2021. https://doi.org/10.1103/PRXQuantum.2.040341.","short":"M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Zemlicka, J.M. Fink, PRX Quantum 2 (2021) 040341.","mla":"Peruzzo, Matilda, et al. “Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction.” PRX Quantum, vol. 2, no. 4, American Physical Society, 2021, p. 040341, doi:10.1103/PRXQuantum.2.040341."},"date_published":"2021-11-24T00:00:00Z","keyword":["quantum physics","mesoscale and nanoscale physics"],"scopus_import":"1","day":"24","has_accepted_license":"1","article_processing_charge":"No","publication_status":"published","department":[{"_id":"JoFi"},{"_id":"NanoFab"},{"_id":"M-Shop"}],"publisher":"American Physical Society","year":"2021","acknowledgement":"We thank W. Hughes for analytic and numerical modeling during the early stages of this work, J. Koch for discussions and support with the scqubits package, R. Sett, P. Zielinski, and L. Drmic for software development, and G. Katsaros for equipment support, as well as the MIBA workshop and the Institute of Science and Technology Austria nanofabrication facility. We thank I. Pop, S. Deleglise, and E. Flurin for discussions. This work was supported by a NOMIS Foundation research grant, the Austrian Science Fund (FWF) through BeyondC (F7105), and IST Austria. M.P. is the recipient of a Pöttinger scholarship at IST Austria. E.R. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria.","date_created":"2021-08-17T08:14:18Z","date_updated":"2023-09-07T13:31:22Z","volume":2,"author":[{"full_name":"Peruzzo, Matilda","first_name":"Matilda","last_name":"Peruzzo","id":"3F920B30-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-3415-4628"},{"first_name":"Farid","last_name":"Hassani","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6937-5773","full_name":"Hassani, Farid"},{"full_name":"Szep, Gregory","last_name":"Szep","first_name":"Gregory"},{"id":"42F71B44-F248-11E8-B48F-1D18A9856A87","last_name":"Trioni","first_name":"Andrea","full_name":"Trioni, Andrea"},{"full_name":"Redchenko, Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","last_name":"Redchenko","first_name":"Elena"},{"first_name":"Martin","last_name":"Zemlicka","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","full_name":"Zemlicka, Martin"},{"full_name":"Fink, Johannes M","last_name":"Fink","first_name":"Johannes M","orcid":"0000-0001-8112-028X","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"related_material":{"record":[{"status":"public","relation":"research_data","id":"13057"},{"id":"9920","status":"public","relation":"dissertation_contains"}]},"file_date_updated":"2022-01-18T11:29:33Z","ec_funded":1,"quality_controlled":"1","isi":1,"project":[{"call_identifier":"FWF","name":"Integrating superconducting quantum circuits","_id":"26927A52-B435-11E9-9278-68D0E5697425","grant_number":"F07105"},{"name":"International IST Doctoral Program","call_identifier":"H2020","grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"},{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"2622978C-B435-11E9-9278-68D0E5697425"}],"external_id":{"arxiv":["2106.05882"],"isi":["000723015100001"]},"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"oa":1,"acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}],"language":[{"iso":"eng"}],"doi":"10.1103/PRXQuantum.2.040341","month":"11","publication_identifier":{"eissn":["2691-3399"]}}]