title: Fast spin-orbit qubit in an indium antimonide nanowire.
abstract: Because of the strong spin-orbit interaction in indium antimonide, orbital motion and spin are no longer separated. This enables fast manipulation of qubit states by means of microwave electric fields. We report Rabi oscillation frequencies exceeding 100 MHz for spin-orbit qubits in InSb nanowires. Individual qubits can be selectively addressed due to intrinsic differences in their g factors. Based on Ramsey fringe measurements, we extract a coherence time T(2)(*)=8±1 ns at a driving frequency of 18.65 GHz. Applying a Hahn echo sequence extends this coherence time to 34 ns.
authors: Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.
authors: J W G
authors: JW
authors: van den Berg
authors: S
authors: S
authors: Nadj-Perge
authors: V S
authors: VS
authors: Pribiag
authors: S R
authors: SR
authors: Plissard
authors: E P A M
authors: EP
authors: Bakkers
authors: S M
authors: SM
authors: Frolov
authors: L P
authors: LP
authors: Kouwenhoven