Universal Phase Shift and Nonexponential Decay of Driven Single-Spin Oscillations

2007/03/31 by F. H. L. Koppens, Frank H. L. Koppens, D. Klauser +9 · 4 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.99.106803

published as Phys. Rev. Lett. 99, 106803 (2007) · Main text: 4 pages, 3 figures, Supplementary material: 2 pages, 3 figures

openalex publication_date 2007/09/07 · arxiv created 2007/11/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study, both theoretically and experimentally, driven Rabi oscillations of a single electron spin coupled to a nuclear-spin bath. Because of 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 approximately 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.

Citations

• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots
• Single-shot read-out of an individual electron spin in a quantum dot

Cited by

• Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots
• Coherent spin rotations in open driven double quantum dots
• Spin Echo of a Single Electron Spin in a Quantum Dot
• Theory of electric dipole spin resonance in quantum dots: Mean field theory with Gaussian fluctuations and beyond