Fast spin-orbit qubit in an indium antimonide nanowire

J. W G Van Den Berg, S. Nadj-Perge, V. S. Pribiag, S. R. Plissard, E. P A M Bakkers, S. M. Frolov, L. P. Kouwenhoven

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

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±1 ns at a driving frequency of 18.65 GHz. Applying a Hahn echo sequence extends this coherence time to 34 ns.

Original languageEnglish (US)
Article number066806
JournalPhysical review letters
Volume110
Issue number6
DOIs
StatePublished - Feb 8 2013

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