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- W4384263432 abstract "Bound states in quantum dots coupled to superconductors can be in a coherent superposition of states with different electron number but with the same number parity. Electrostatic gating can tune this superposition to a sweet spot, where the quantum dot has the same mean electric charge independent of its electron-number parity. Here, we propose to encode quantum information in the local fermion parity of two tunnel-coupled quantum dots embedded in a Josephson junction. At the sweet spot, the qubit states have zero charge dipole moment. This protects the qubit from dephasing due to electric field fluctuations. Depending on the strength of the tunnel coupling between the dots, the system is further protected towards either relaxation (weak tunneling) or dephasing (strong tunneling) from noise coupling separately to each quantum dot. We describe initialization and readout as well as single-qubit and two-qubit gates by pulsing gate voltages." @default.
- W4384263432 created "2023-07-14" @default.
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- W4384263432 date "2023-07-11" @default.
- W4384263432 modified "2023-10-17" @default.
- W4384263432 title "A fermion-parity qubit in a proximitized double quantum dot" @default.
- W4384263432 doi "https://doi.org/10.48550/arxiv.2307.05678" @default.
- W4384263432 hasPublicationYear "2023" @default.
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