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

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.

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

References in corpus (4)

• Single-shot read-out of an individual electron spin in a quantum dot
• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot

Cited by in corpus (6)

• Coherent control of a single electron spin with electric fields
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Exponential decay in a spin bath
• Coherent spin rotations in open driven double quantum dots
• Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots
• Weak measurement of quantum dot spin qubits