Qubit ZooFirst demonstration of coherent manipulation of an Andreev spin qubit: a qubit encoded in the spin degree of freedom of a single Andreev bound state in a semiconductor-superconductor Josephson junction. Distinct from the gatemon (which uses the charge/parity degree of freedom).
Key Results
- Qubit states: spin-up and spin-down of a single Andreev bound state
- Coherent Rabi oscillations and Ramsey fringes
- T₂* ~ 50 ns (limited by charge noise in junction)
- Readout via dispersive shift of a coupled microwave resonator
- Platform: InAs nanowire Josephson junction
Links
- Journal: Science
- arXiv: 2101.06701