{"date_published":"2024-03-26T00:00:00Z","abstract":[{"text":"Gate-tunable transmons (gatemons) employing semiconductor Josephson junctions\r\nhave recently emerged as building blocks for hybrid quantum circuits. In this\r\nstudy, we present a gatemon fabricated in planar Germanium. We induce\r\nsuperconductivity in a two-dimensional hole gas by evaporating aluminum atop a\r\nthin spacer, which separates the superconductor from the Ge quantum well. The\r\nJosephson junction is then integrated into an Xmon circuit and capacitively\r\ncoupled to a transmission line resonator. We showcase the qubit tunability in a\r\nbroad frequency range with resonator and two-tone spectroscopy. Time-domain\r\ncharacterizations reveal energy relaxation and coherence times up to 75 ns. Our\r\nresults, combined with the recent advances in the spin qubit field, pave the\r\nway towards novel hybrid and protected qubits in a group IV, CMOS-compatible\r\nmaterial.","lang":"eng"}],"author":[{"last_name":"Sagi","full_name":"Sagi, Oliver","id":"71616374-A8E9-11E9-A7CA-09ECE5697425","first_name":"Oliver"},{"last_name":"Crippa","orcid":"0000-0002-2968-611X","full_name":"Crippa, Alessandro","first_name":"Alessandro","id":"1F2B21A2-F6E7-11E9-9B82-F7DBE5697425"},{"full_name":"Valentini, Marco","last_name":"Valentini","first_name":"Marco","id":"C0BB2FAC-D767-11E9-B658-BC13E6697425"},{"last_name":"Janik","full_name":"Janik, Marian","id":"396A1950-F248-11E8-B48F-1D18A9856A87","first_name":"Marian"},{"last_name":"Baghumyan","full_name":"Baghumyan, Levon","id":"7aa1f788-b527-11ee-aa9e-e6111a79e0c7","first_name":"Levon"},{"full_name":"Fabris, Giorgio","last_name":"Fabris","id":"298cf6f3-1ff6-11ee-9fa6-d94cfa0b3352","first_name":"Giorgio"},{"first_name":"Lucky","id":"84b9700b-15b2-11ec-abd3-831089e67615","last_name":"Kapoor","full_name":"Kapoor, Lucky"},{"first_name":"Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid","last_name":"Hassani","orcid":"0000-0001-6937-5773"},{"id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","first_name":"Johannes M","full_name":"Fink, Johannes M","orcid":"0000-0001-8112-028X","last_name":"Fink"},{"full_name":"Calcaterra, Stefano","last_name":"Calcaterra","first_name":"Stefano"},{"first_name":"Daniel","last_name":"Chrastina","full_name":"Chrastina, Daniel"},{"last_name":"Isella","full_name":"Isella, Giovanni","first_name":"Giovanni"},{"full_name":"Katsaros, Georgios","orcid":"0000-0001-8342-202X","last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios"}],"acknowledged_ssus":[{"_id":"ScienComp"},{"_id":"M-Shop"},{"_id":"NanoFab"}],"date_updated":"2024-07-04T14:27:13Z","article_processing_charge":"No","publication_status":"submitted","_id":"17202","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","citation":{"short":"O. Sagi, A. Crippa, M. Valentini, M. Janik, L. Baghumyan, G. Fabris, L. Kapoor, F. Hassani, J.M. Fink, S. Calcaterra, D. Chrastina, G. Isella, G. Katsaros, ArXiv (n.d.).","ieee":"O. Sagi <i>et al.</i>, “A gate tunable transmon qubit in planar Ge,” <i>arXiv</i>. .","ista":"Sagi O, Crippa A, Valentini M, Janik M, Baghumyan L, Fabris G, Kapoor L, Hassani F, Fink JM, Calcaterra S, Chrastina D, Isella G, Katsaros G. A gate tunable transmon qubit in planar Ge. arXiv, <a href=\"https://doi.org/10.48550/arXiv.2403.16774\">10.48550/arXiv.2403.16774</a>.","apa":"Sagi, O., Crippa, A., Valentini, M., Janik, M., Baghumyan, L., Fabris, G., … Katsaros, G. (n.d.). A gate tunable transmon qubit in planar Ge. <i>arXiv</i>. <a href=\"https://doi.org/10.48550/arXiv.2403.16774\">https://doi.org/10.48550/arXiv.2403.16774</a>","ama":"Sagi O, Crippa A, Valentini M, et al. A gate tunable transmon qubit in planar Ge. <i>arXiv</i>. doi:<a href=\"https://doi.org/10.48550/arXiv.2403.16774\">10.48550/arXiv.2403.16774</a>","mla":"Sagi, Oliver, et al. “A Gate Tunable Transmon Qubit in Planar Ge.” <i>ArXiv</i>, doi:<a href=\"https://doi.org/10.48550/arXiv.2403.16774\">10.48550/arXiv.2403.16774</a>.","chicago":"Sagi, Oliver, Alessandro Crippa, Marco Valentini, Marian Janik, Levon Baghumyan, Giorgio Fabris, Lucky Kapoor, et al. “A Gate Tunable Transmon Qubit in Planar Ge.” <i>ArXiv</i>, n.d. <a href=\"https://doi.org/10.48550/arXiv.2403.16774\">https://doi.org/10.48550/arXiv.2403.16774</a>."},"doi":"10.48550/arXiv.2403.16774","oa_version":"Preprint","type":"preprint","department":[{"_id":"GeKa"}],"title":"A gate tunable transmon qubit in planar Ge","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"publication":"arXiv","related_material":{"record":[{"id":"17196","status":"public","relation":"research_data"}]},"status":"public","language":[{"iso":"eng"}],"day":"26","oa":1,"date_created":"2024-07-04T11:40:45Z","month":"03","corr_author":"1","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2403.16774","open_access":"1"}],"external_id":{"arxiv":["2403.16774"]},"year":"2024","project":[{"_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"},{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"262116AA-B435-11E9-9278-68D0E5697425"}],"license":"https://creativecommons.org/licenses/by/4.0/"}