Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit
We realize a hybrid superconductor-semiconductor transmon device in which the Josephson effect is controlled by a gate-defined quantum dot in an InAs-Al nanowire. Microwave spectroscopy of the transition spectrum of the transmon allows us to probe the ground-state parity of the quantum dot as a func...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-07-01
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| Series: | PRX Quantum |
| Online Access: | http://doi.org/10.1103/PRXQuantum.3.030311 |
| _version_ | 1818096924020965376 |
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| author | Arno Bargerbos Marta Pita-Vidal Rok Žitko Jesús Ávila Lukas J. Splitthoff Lukas Grünhaupt Jaap J. Wesdorp Christian K. Andersen Yu Liu Leo P. Kouwenhoven Ramón Aguado Angela Kou Bernard van Heck |
| author_facet | Arno Bargerbos Marta Pita-Vidal Rok Žitko Jesús Ávila Lukas J. Splitthoff Lukas Grünhaupt Jaap J. Wesdorp Christian K. Andersen Yu Liu Leo P. Kouwenhoven Ramón Aguado Angela Kou Bernard van Heck |
| author_sort | Arno Bargerbos |
| collection | DOAJ |
| description | We realize a hybrid superconductor-semiconductor transmon device in which the Josephson effect is controlled by a gate-defined quantum dot in an InAs-Al nanowire. Microwave spectroscopy of the transition spectrum of the transmon allows us to probe the ground-state parity of the quantum dot as a function of the gate voltages, the external magnetic flux, and the magnetic field applied parallel to the nanowire. The measured parity phase diagram is in agreement with that predicted by a single-impurity Anderson model with superconducting leads. Through continuous-time monitoring of the circuit, we furthermore resolve the quasiparticle dynamics of the quantum dot Josephson junction across the phase boundaries. Our results can facilitate the realization of semiconductor-based 0-π qubits and Andreev qubits. |
| first_indexed | 2024-12-10T23:12:21Z |
| format | Article |
| id | doaj.art-49e305e5622b4fc7b78a917b111a83ee |
| institution | Directory Open Access Journal |
| issn | 2691-3399 |
| language | English |
| last_indexed | 2024-12-10T23:12:21Z |
| publishDate | 2022-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | PRX Quantum |
| spelling | doaj.art-49e305e5622b4fc7b78a917b111a83ee2022-12-22T01:29:54ZengAmerican Physical SocietyPRX Quantum2691-33992022-07-013303031110.1103/PRXQuantum.3.030311Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon CircuitArno BargerbosMarta Pita-VidalRok ŽitkoJesús ÁvilaLukas J. SplitthoffLukas GrünhauptJaap J. WesdorpChristian K. AndersenYu LiuLeo P. KouwenhovenRamón AguadoAngela KouBernard van HeckWe realize a hybrid superconductor-semiconductor transmon device in which the Josephson effect is controlled by a gate-defined quantum dot in an InAs-Al nanowire. Microwave spectroscopy of the transition spectrum of the transmon allows us to probe the ground-state parity of the quantum dot as a function of the gate voltages, the external magnetic flux, and the magnetic field applied parallel to the nanowire. The measured parity phase diagram is in agreement with that predicted by a single-impurity Anderson model with superconducting leads. Through continuous-time monitoring of the circuit, we furthermore resolve the quasiparticle dynamics of the quantum dot Josephson junction across the phase boundaries. Our results can facilitate the realization of semiconductor-based 0-π qubits and Andreev qubits.http://doi.org/10.1103/PRXQuantum.3.030311 |
| spellingShingle | Arno Bargerbos Marta Pita-Vidal Rok Žitko Jesús Ávila Lukas J. Splitthoff Lukas Grünhaupt Jaap J. Wesdorp Christian K. Andersen Yu Liu Leo P. Kouwenhoven Ramón Aguado Angela Kou Bernard van Heck Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit PRX Quantum |
| title | Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit |
| title_full | Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit |
| title_fullStr | Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit |
| title_full_unstemmed | Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit |
| title_short | Singlet-Doublet Transitions of a Quantum Dot Josephson Junction Detected in a Transmon Circuit |
| title_sort | singlet doublet transitions of a quantum dot josephson junction detected in a transmon circuit |
| url | http://doi.org/10.1103/PRXQuantum.3.030311 |
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