{"article_processing_charge":"No","project":[{"grant_number":"101069515","name":"Integrated GermaNIum quanTum tEchnology","_id":"34c0acea-11ca-11ed-8bc3-8775e10fd452"},{"call_identifier":"FWF","grant_number":"P32235","name":"Towards scalable hut wire quantum devices","_id":"237B3DA4-32DE-11EA-91FC-C7463DDC885E"},{"grant_number":"P36507","name":"Merging spin and superconducting qubits in planar Ge","_id":"bd8bd29e-d553-11ed-ba76-f0070d4b237a"},{"grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins","_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1"}],"abstract":[{"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.","lang":"eng"}],"publication_status":"submitted","external_id":{"arxiv":["2407.03079"]},"title":"Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors","_id":"18144","department":[{"_id":"GeKa"},{"_id":"GradSch"}],"oa":1,"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png"},"doi":"10.48550/arXiv.2407.03079","publication":"arXiv","year":"2024","month":"07","corr_author":"1","citation":{"mla":"Janik, Marian, 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>.","ama":"Janik M, Roux KER, Espinosa CB, 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 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>.","short":"M. Janik, K.E.R. Roux, C.B. 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.).","apa":"Janik, M., Roux, K. E. R., Espinosa, C. B., 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>","ista":"Janik M, Roux KER, Espinosa CB, 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, <a href=\"https://doi.org/10.48550/arXiv.2407.03079\">10.48550/arXiv.2407.03079</a>.","ieee":"M. Janik <i>et al.</i>, “Strong charge-photon coupling in planar germanium enabled by granular  aluminium superinductors,” <i>arXiv</i>. ."},"oa_version":"Preprint","date_updated":"2024-09-26T12:35:34Z","type":"preprint","acknowledgement":"We acknowledge Franco De Palma, Mahya Khorramshahi, Fabian Oppliger, Thomas Reisinger, Pasquale\r\nScarlino and Xiao Xue for helpful discussions. This research was supported by the Scientific Service Units of\r\nISTA through resources provided by the MIBA Machine\r\nShop and the Nanofabrication facility. This research and\r\nrelated results were made possible with the support of\r\nthe NOMIS Foundation, the HORIZON-RIA 101069515\r\nproject, the FWF Projects with DOI:10.55776/P32235,\r\nDOI:10.55776/I5060 and DOI:10.55776/P36507. IMP\r\nacknowledges funding from the Deutsche Forschungsgemeinschaft (DFG – German Research Foundation) under project number 450396347 (GeHoldeQED). ICN2\r\nacknowledges funding from Generalitat de Catalunya\r\n2021SGR00457. We acknowledge support from CSIC\r\nInterdisciplinary Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+). This research work has\r\nbeen 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\r\nMCIN/AEI (Grant No.: CEX2021-001214-S) and is\r\nfunded by the CERCA Programme/Generalitat de\r\nCatalunya. Part of the present work has been performed in the framework of Universitat Autònoma de\r\nBarcelona Materials Science PhD program. AGM has received funding from Grant RYC2021-033479-I funded by\r\nMCIN/AEI/10.13039/501100011033 and by European\r\nUnion NextGenerationEU/PRTR. M.B. acknowledges\r\nsupport from SUR Generalitat de Catalunya and the\r\nEU Social Fund; project ref. 2020 FI 00103. The authors\r\nacknowledge the use of instrumentation and the technical\r\nadvice provided by the Joint Electron Microscopy Center\r\nat ALBA (JEMCA). ICN2 acknowledges funding from\r\nGrant 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\r\nis a founding member of e-DREAM [60]","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","date_created":"2024-09-26T09:50:43Z","author":[{"first_name":"Marian","full_name":"Janik, Marian","id":"396A1950-F248-11E8-B48F-1D18A9856A87","last_name":"Janik"},{"full_name":"Roux, Kevin Etienne Robert","first_name":"Kevin Etienne Robert","last_name":"Roux","id":"53f93ea2-803f-11ed-ab7e-b283135794ef"},{"full_name":"Espinosa, Carla Borja","first_name":"Carla Borja","last_name":"Espinosa"},{"last_name":"Sagi","id":"71616374-A8E9-11E9-A7CA-09ECE5697425","first_name":"Oliver","full_name":"Sagi, Oliver"},{"full_name":"Baghdadi, Abdulhamid","first_name":"Abdulhamid","id":"160D87FA-96B5-11E9-BF77-7626E6697425","last_name":"Baghdadi"},{"full_name":"Adletzberger, Thomas","first_name":"Thomas","id":"38756BB2-F248-11E8-B48F-1D18A9856A87","last_name":"Adletzberger"},{"last_name":"Calcaterra","full_name":"Calcaterra, Stefano","first_name":"Stefano"},{"full_name":"Botifoll, Marc","first_name":"Marc","last_name":"Botifoll"},{"first_name":"Alba Garzón","full_name":"Manjón, Alba Garzón","last_name":"Manjón"},{"full_name":"Arbiol, Jordi","first_name":"Jordi","last_name":"Arbiol"},{"last_name":"Chrastina","first_name":"Daniel","full_name":"Chrastina, Daniel"},{"full_name":"Isella, Giovanni","first_name":"Giovanni","last_name":"Isella"},{"first_name":"Ioan M.","full_name":"Pop, Ioan M.","last_name":"Pop"},{"last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8342-202X","first_name":"Georgios","full_name":"Katsaros, Georgios"}],"license":"https://creativecommons.org/licenses/by/4.0/","language":[{"iso":"eng"}],"date_published":"2024-07-03T00:00:00Z","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2407.03079"}],"related_material":{"record":[{"relation":"dissertation_contains","status":"for_moderation","id":"18129"}]},"day":"03","status":"public"}