Spectroscopy of Spin-Orbit Quantum Bits in Indium Antimonide Nanowires

Journal article (2012)
Department
QN/Quantum Nanoscience (AS) (TU Delft)
Copyright: American Physical Society
DOI: https://doi.org/doi:10.1103/PhysRevLett.108.166801
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Published Date

19-04-2012

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Source:

Physical Review Letters, 108 (16), 2012

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Abstract

A double quantum dot in the few-electron regime is achieved using local gating in an InSb nanowire. The spectrum of two-electron eigenstates is investigated using electric dipole spin resonance. Singlet-triplet level repulsion caused by spin-orbit interaction is observed. The size and the anisotropy of singlet-triplet repulsion are used to determine the magnitude and the orientation of the spin-orbit effective field in an InSb nanowire double dot. The obtained results are confirmed using spin blockade leakage current anisotropy and transport spectroscopy of individual quantum dots.