Universal phase shift and non-exponential decay of driven single-spin oscillations

Details Universal phase shift and non-exponential decay of driven single-spin oscillations Universal phase shift and non-exponential decay of driven single-spin oscillations

2007-03-24

arxiv.org/abs/cond-mat/0703640v2

Phys. Rev. Lett. 99, 106803 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Main text: 4 pages, 3 figures, Supplementary material: 2 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.99.106803

We study, both theoretically and experimentally, driven Rabi oscillations of a single electron spin coupled to a nuclear spin bath. Due to the long correlation time of the bath, two unusual features are observed in the oscillations. The decay follows a power law, and the oscillations are shifted in phase by a universal value of ~pi/4. These properties are well understood from a theoretical expression that we derive here in the static limit for the nuclear bath. This improved understanding of the coupled electron-nuclear system is important for future experiments using the electron spin as a qubit.

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