Flux-tunable parity-protected qubit based on a single full-shell nanowire Josephson junction
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866916804814700544 |
|---|---|
| author | Giavaras, G. Souto, Ruben Seoane Calderon, Maria Jose Aguado, Ramon |
| author_facet | Giavaras, G. Souto, Ruben Seoane Calderon, Maria Jose Aguado, Ramon |
| contents | Leveraging the higher harmonics content of the Josephson potential in a superconducting circuit offers a promising route in the search for new qubits with increased protection against decoherence. In this work, we demonstrate how the flux tunability of a hybrid semiconductor-superconductor Josephson junction based on a single full-shell nanowire enables this possibility. Near one flux quantum, $Φ\approx Φ_0=h/2e$, we find that the qubit system can be tuned from a gatemon regime to a parity-protected regime with qubit eigenstates localized in phase space in the $0$ and $π$ minima of the Josephson potential ($\cos 2φ_0$). Estimates of qubit coherence and relaxation times due to different noise sources are presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_05284 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Flux-tunable parity-protected qubit based on a single full-shell nanowire Josephson junction Giavaras, G. Souto, Ruben Seoane Calderon, Maria Jose Aguado, Ramon Mesoscale and Nanoscale Physics Leveraging the higher harmonics content of the Josephson potential in a superconducting circuit offers a promising route in the search for new qubits with increased protection against decoherence. In this work, we demonstrate how the flux tunability of a hybrid semiconductor-superconductor Josephson junction based on a single full-shell nanowire enables this possibility. Near one flux quantum, $Φ\approx Φ_0=h/2e$, we find that the qubit system can be tuned from a gatemon regime to a parity-protected regime with qubit eigenstates localized in phase space in the $0$ and $π$ minima of the Josephson potential ($\cos 2φ_0$). Estimates of qubit coherence and relaxation times due to different noise sources are presented. |
| title | Flux-tunable parity-protected qubit based on a single full-shell nanowire Josephson junction |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.05284 |