[{"language":[{"iso":"eng"}],"quality_controlled":"1","ec_funded":1,"year":"2022","publication":"Physical Review Letters","article_type":"original","intvolume":"       128","date_published":"2022-03-24T00:00:00Z","ddc":["530"],"date_created":"2022-03-24T15:51:11Z","citation":{"ieee":"D. Jirovec <i>et al.</i>, “Dynamics of hole singlet-triplet qubits with large g-factor differences,” <i>Physical Review Letters</i>, vol. 128, no. 12. American Physical Society, 2022.","ista":"Jirovec D, Mutter PM, Hofmann AC, Crippa A, Rychetsky M, Craig DL, Kukucka J, Martins F, Ballabio A, Ares N, Chrastina D, Isella G, Burkard G, Katsaros G. 2022. Dynamics of hole singlet-triplet qubits with large g-factor differences. Physical Review Letters. 128(12), 126803.","ama":"Jirovec D, Mutter PM, Hofmann AC, et al. Dynamics of hole singlet-triplet qubits with large g-factor differences. <i>Physical Review Letters</i>. 2022;128(12). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">10.1103/PhysRevLett.128.126803</a>","apa":"Jirovec, D., Mutter, P. M., Hofmann, A. C., Crippa, A., Rychetsky, M., Craig, D. L., … Katsaros, G. (2022). Dynamics of hole singlet-triplet qubits with large g-factor differences. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">https://doi.org/10.1103/PhysRevLett.128.126803</a>","mla":"Jirovec, Daniel, et al. “Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences.” <i>Physical Review Letters</i>, vol. 128, no. 12, 126803, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">10.1103/PhysRevLett.128.126803</a>.","short":"D. Jirovec, P.M. Mutter, A.C. Hofmann, A. Crippa, M. Rychetsky, D.L. Craig, J. Kukucka, F. Martins, A. Ballabio, N. Ares, D. Chrastina, G. Isella, G. Burkard, G. Katsaros, Physical Review Letters 128 (2022).","chicago":"Jirovec, Daniel, Philipp M. Mutter, Andrea C Hofmann, Alessandro Crippa, Marek Rychetsky, David L. Craig, Josip Kukucka, et al. “Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences.” <i>Physical Review Letters</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">https://doi.org/10.1103/PhysRevLett.128.126803</a>."},"has_accepted_license":"1","external_id":{"arxiv":["2111.05130"],"pmid":["35394319"],"isi":["000786542500004"]},"arxiv":1,"oa_version":"Published Version","oa":1,"project":[{"_id":"26A151DA-B435-11E9-9278-68D0E5697425","grant_number":"844511","call_identifier":"H2020","name":"Majorana bound states in Ge/SiGe heterostructures"},{"_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020"},{"_id":"2641CE5E-B435-11E9-9278-68D0E5697425","grant_number":"P30207","name":"Hole spin orbit qubits in Ge quantum wells","call_identifier":"FWF"},{"_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1","grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins"},{"_id":"c08c05c4-5a5b-11eb-8a69-dc6ce49d7973","grant_number":"M03032","name":"Long-range spin exchange for 2D qubits architectures"}],"article_number":"126803","department":[{"_id":"GradSch"},{"_id":"GeKa"}],"file":[{"file_size":1266515,"date_created":"2022-03-28T06:53:39Z","date_updated":"2022-03-28T06:53:39Z","file_name":"2022_PhysRevLetters_Jirovec.pdf","content_type":"application/pdf","access_level":"open_access","success":1,"checksum":"6e66ad548d18db9c131f304acbd5a1f4","creator":"dernst","file_id":"10928","relation":"main_file"}],"author":[{"id":"4C473F58-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7197-4801","last_name":"Jirovec","full_name":"Jirovec, Daniel","first_name":"Daniel"},{"last_name":"Mutter","full_name":"Mutter, Philipp M.","first_name":"Philipp M."},{"first_name":"Andrea C","full_name":"Hofmann, Andrea C","id":"340F461A-F248-11E8-B48F-1D18A9856A87","last_name":"Hofmann"},{"full_name":"Crippa, Alessandro","first_name":"Alessandro","id":"1F2B21A2-F6E7-11E9-9B82-F7DBE5697425","orcid":"0000-0002-2968-611X","last_name":"Crippa"},{"first_name":"Marek","full_name":"Rychetsky, Marek","last_name":"Rychetsky"},{"last_name":"Craig","first_name":"David L.","full_name":"Craig, David L."},{"last_name":"Kukucka","id":"3F5D8856-F248-11E8-B48F-1D18A9856A87","full_name":"Kukucka, Josip","first_name":"Josip"},{"id":"38F80F9A-1CB8-11EA-BC76-B49B3DDC885E","orcid":"0000-0003-2668-2401","last_name":"Martins","first_name":"Frederico","full_name":"Martins, Frederico"},{"full_name":"Ballabio, Andrea","first_name":"Andrea","last_name":"Ballabio"},{"full_name":"Ares, Natalia","first_name":"Natalia","last_name":"Ares"},{"first_name":"Daniel","full_name":"Chrastina, Daniel","last_name":"Chrastina"},{"first_name":"Giovanni","full_name":"Isella, Giovanni","last_name":"Isella"},{"last_name":"Burkard","full_name":"Burkard, Guido ","first_name":"Guido "},{"full_name":"Katsaros, Georgios","first_name":"Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","last_name":"Katsaros","orcid":"0000-0001-8342-202X"}],"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"},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"03","issue":"12","isi":1,"day":"24","article_processing_charge":"No","abstract":[{"lang":"eng","text":"The spin-orbit interaction permits to control the state of a spin qubit via electric fields. For holes it is particularly strong, allowing for fast all electrical qubit manipulation, and yet an in-depth understanding of this interaction in hole systems is missing. Here we investigate, experimentally and theoretically, the effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states by studying singlet-triplet oscillations in a planar Ge hole double quantum dot. Landau-Zener sweeps at different magnetic field directions allow us to disentangle the effects of the spin-orbit induced spin-flip term from those caused by strongly site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides new insights into the hole spin-orbit interaction, necessary for optimizing future qubit experiments."}],"doi":"10.1103/PhysRevLett.128.126803","pmid":1,"corr_author":"1","publication_status":"published","date_updated":"2025-04-14T07:44:07Z","volume":128,"acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"type":"journal_article","acknowledgement":"This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the nanofabrication facility. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie\r\nSkłodowska-Curie Grant Agreement No. 844511, No. 75441, and by the FWF-P 30207, I05060, and M3032-N projects. A. B. acknowledges support from the EU Horizon-2020 FET project microSPIRE, ID: 766955. P.M. M. and G. B. acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG—German Research Foundation) under Project No. 450396347. This work was supported by the Royal Society (URF\\R1\\191150) and the European Research Council (Grant Agreement No. 948932), N. A. acknowledges the use of the University of Oxford Advanced Research Computing (ARC) facility.","publication_identifier":{"eissn":["1079-7114"]},"file_date_updated":"2022-03-28T06:53:39Z","_id":"10920","publisher":"American Physical Society","scopus_import":"1","title":"Dynamics of hole singlet-triplet qubits with large g-factor differences","related_material":{"record":[{"id":"18291","relation":"popular_science","status":"public"}]},"status":"public"},{"external_id":{"isi":["000657596400001"],"pmid":["34083775"],"arxiv":["2011.13755"]},"arxiv":1,"intvolume":"        20","article_type":"original","date_created":"2020-12-02T10:50:47Z","citation":{"ieee":"D. Jirovec <i>et al.</i>, “A singlet triplet hole spin qubit in planar Ge,” <i>Nature Materials</i>, vol. 20, no. 8. Springer Nature, pp. 1106–1112, 2021.","ama":"Jirovec D, Hofmann AC, Ballabio A, et al. A singlet triplet hole spin qubit in planar Ge. <i>Nature Materials</i>. 2021;20(8):1106–1112. doi:<a href=\"https://doi.org/10.1038/s41563-021-01022-2\">10.1038/s41563-021-01022-2</a>","ista":"Jirovec D, Hofmann AC, Ballabio A, Mutter PM, Tavani G, Botifoll M, Crippa A, Kukucka J, Sagi O, Martins F, Saez Mollejo J, Prieto Gonzalez I, Borovkov M, Arbiol J, Chrastina D, Isella G, Katsaros G. 2021. A singlet triplet hole spin qubit in planar Ge. Nature Materials. 20(8), 1106–1112.","mla":"Jirovec, Daniel, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” <i>Nature Materials</i>, vol. 20, no. 8, Springer Nature, 2021, pp. 1106–1112, doi:<a href=\"https://doi.org/10.1038/s41563-021-01022-2\">10.1038/s41563-021-01022-2</a>.","apa":"Jirovec, D., Hofmann, A. C., Ballabio, A., Mutter, P. M., Tavani, G., Botifoll, M., … Katsaros, G. (2021). A singlet triplet hole spin qubit in planar Ge. <i>Nature Materials</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41563-021-01022-2\">https://doi.org/10.1038/s41563-021-01022-2</a>","chicago":"Jirovec, Daniel, Andrea C Hofmann, Andrea Ballabio, Philipp M. Mutter, Giulio Tavani, Marc Botifoll, Alessandro Crippa, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” <i>Nature Materials</i>. Springer Nature, 2021. <a href=\"https://doi.org/10.1038/s41563-021-01022-2\">https://doi.org/10.1038/s41563-021-01022-2</a>.","short":"D. Jirovec, A.C. Hofmann, A. Ballabio, P.M. Mutter, G. Tavani, M. Botifoll, A. Crippa, J. Kukucka, O. Sagi, F. Martins, J. Saez Mollejo, I. Prieto Gonzalez, M. Borovkov, J. Arbiol, D. Chrastina, G. Isella, G. Katsaros, Nature Materials 20 (2021) 1106–1112."},"date_published":"2021-08-01T00:00:00Z","year":"2021","publication":"Nature Materials","quality_controlled":"1","language":[{"iso":"eng"}],"ec_funded":1,"issue":"8","article_processing_charge":"No","day":"01","isi":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"first_name":"Daniel","full_name":"Jirovec, Daniel","last_name":"Jirovec","orcid":"0000-0002-7197-4801","id":"4C473F58-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Andrea C","full_name":"Hofmann, Andrea C","id":"340F461A-F248-11E8-B48F-1D18A9856A87","last_name":"Hofmann"},{"last_name":"Ballabio","first_name":"Andrea","full_name":"Ballabio, Andrea"},{"last_name":"Mutter","first_name":"Philipp M.","full_name":"Mutter, Philipp M."},{"last_name":"Tavani","first_name":"Giulio","full_name":"Tavani, Giulio"},{"first_name":"Marc","full_name":"Botifoll, Marc","last_name":"Botifoll"},{"full_name":"Crippa, Alessandro","first_name":"Alessandro","id":"1F2B21A2-F6E7-11E9-9B82-F7DBE5697425","last_name":"Crippa","orcid":"0000-0002-2968-611X"},{"id":"3F5D8856-F248-11E8-B48F-1D18A9856A87","last_name":"Kukucka","full_name":"Kukucka, Josip","first_name":"Josip"},{"first_name":"Oliver","full_name":"Sagi, Oliver","id":"71616374-A8E9-11E9-A7CA-09ECE5697425","last_name":"Sagi"},{"last_name":"Martins","orcid":"0000-0003-2668-2401","id":"38F80F9A-1CB8-11EA-BC76-B49B3DDC885E","first_name":"Frederico","full_name":"Martins, Frederico"},{"id":"e0390f72-f6e0-11ea-865d-862393336714","last_name":"Saez Mollejo","full_name":"Saez Mollejo, Jaime","first_name":"Jaime"},{"first_name":"Ivan","full_name":"Prieto Gonzalez, Ivan","id":"2A307FE2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7370-5357","last_name":"Prieto Gonzalez"},{"first_name":"Maksim","full_name":"Borovkov, Maksim","id":"2ac7a0a2-3562-11eb-9256-fbd18ea55087","last_name":"Borovkov"},{"first_name":"Jordi","full_name":"Arbiol, Jordi","last_name":"Arbiol"},{"first_name":"Daniel","full_name":"Chrastina, Daniel","last_name":"Chrastina"},{"full_name":"Isella, Giovanni","first_name":"Giovanni","last_name":"Isella"},{"orcid":"0000-0001-8342-202X","last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios","full_name":"Katsaros, Georgios"}],"month":"08","project":[{"call_identifier":"H2020","name":"Majorana bound states in Ge/SiGe heterostructures","_id":"26A151DA-B435-11E9-9278-68D0E5697425","grant_number":"844511"},{"call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"grant_number":"P30207","_id":"2641CE5E-B435-11E9-9278-68D0E5697425","name":"Hole spin orbit qubits in Ge quantum wells","call_identifier":"FWF"},{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"262116AA-B435-11E9-9278-68D0E5697425"}],"oa":1,"department":[{"_id":"GeKa"},{"_id":"NanoFab"},{"_id":"GradSch"}],"oa_version":"Preprint","acknowledgement":"This research was supported by the Scientific Service Units of Institute of Science and Technology (IST) Austria through resources provided by the Miba Machine Shop and the nanofabrication facility, and was made possible with the support of the NOMIS Foundation. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreements no. 844511 and no. 75441, and by the Austrian Science Fund FWF-P 30207 project. A.B. acknowledges support from the European Union Horizon 2020 FET project microSPIRE, no. 766955. M. Botifoll and J.A. acknowledge funding from Generalitat de Catalunya 2017 SGR 327. The Catalan Institute of Nanoscience and Nanotechnology (ICN2) is supported by the Severo Ochoa programme from the Spanish Ministery of Economy (MINECO) (grant no. SEV-2017-0706) and is funded by the Catalonian Research Centre (CERCA) Programme, Generalitat de Catalunya. Part of the present work has been performed within the framework of the Universitat Autónoma de Barcelona Materials Science PhD programme. Part of the HAADF scanning transmission electron microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon, Universidad de Zaragoza. ICN2 acknowledge support from the Spanish Superior Council of Scientific Research (CSIC) Research Platform on Quantum Technologies PTI-001. M.B. acknowledges funding from the Catalan Agency for Management of University and Research Grants (AGAUR) Generalitat de Catalunya formation of investigators (FI) PhD grant.","type":"journal_article","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"publication_identifier":{"eissn":["1476-4660"],"issn":["1476-1122"]},"publication_status":"published","corr_author":"1","volume":20,"date_updated":"2026-04-02T22:30:37Z","pmid":1,"abstract":[{"lang":"eng","text":"Spin qubits are considered to be among the most promising candidates for building a quantum processor. Group IV hole spin qubits have moved into the focus of interest due to the ease of operation and compatibility with Si technology. In addition, Ge offers the option for monolithic superconductor-semiconductor integration. Here we demonstrate a hole spin qubit operating at fields below 10 mT, the critical field of Al, by exploiting the large out-of-plane hole g-factors in planar Ge and by encoding the qubit into the singlet-triplet states of a double quantum dot. We observe electrically controlled X and Z-rotations with tunable frequencies exceeding 100 MHz and dephasing times of 1μs which we extend beyond 15μs with echo techniques. These results show that Ge hole singlet triplet qubits outperform their electronic Si and GaAs based counterparts in speed and coherence, respectively. In addition, they are on par with Ge single spin qubits, but can be operated at much lower fields underlining their potential for on chip integration with superconducting technologies."}],"doi":"10.1038/s41563-021-01022-2","status":"public","related_material":{"record":[{"status":"public","relation":"research_data","id":"9323"},{"id":"10058","relation":"dissertation_contains","status":"public"}],"link":[{"url":"https://ist.ac.at/en/news/quantum-computing-with-holes/","relation":"press_release","description":"News on IST Homepage"}]},"publisher":"Springer Nature","_id":"8909","page":"1106–1112","title":"A singlet triplet hole spin qubit in planar Ge","scopus_import":"1","main_file_link":[{"url":"https://arxiv.org/abs/2011.13755","open_access":"1"}]}]