Flux-tunable parity-protected qubit based on a single full-shell nanowire Josephson junction
G. Giavaras, Rubén Seoane Souto, Maria José Calderón, Ramón Aguado
DOI 10.1103/6kxs-wnbw · Physical Review B
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Abstract
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≈Φ0=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 φ0=0 and π minima of the Josephson potential (cos2φ0). Estimates of qubit coherence and relaxation times due to different noise sources are presented.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| TaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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