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

F. H. L. Koppens·D. Klauser·W. A. Coish·K. C. Nowack·L. P. Kouwenhoven·D. Loss·L. M. K. Vandersypen
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Abstract

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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F. H. L. Koppens, D. Klauser, W. A. Coish, K. C. Nowack, L. P. Kouwenhoven, D. Loss, L. M. K. Vandersypen. 2007-11-03. Universal phase shift and non-exponential decay of driven single-spin oscillations. https://doi.org/10.1103/physrevlett.99.106803

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