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 T2*=8±1ns at a driving frequency of 18.65 GHz. Applying a Hahn echo sequence extends this coherence time to 34 ns.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2013
- DOI:
- arXiv:
- arXiv:1210.7229
- Bibcode:
- 2013PhRvL.110f6806V
- Keywords:
-
- 73.63.Kv;
- 03.67.Lx;
- 85.35.Be;
- Quantum dots;
- Quantum computation;
- Quantum well devices;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 8 pages, 8 figures including supplementary material