Stabilizing nuclear spins around semiconductor electrons via the interplay of optical coherent population trapping and dynamic nuclear polarization

Abstract

We experimentally demonstrate how coherent population trapping (CPT) for donor-bound electron spins in GaAs results in autonomous feedback that prepares stabilized states for the spin polarization of nuclei around the electrons. CPT was realized by excitation with two lasers to a bound-exciton state. Transmission studies of the spectral CPT feature on an ensemble of electrons directly reveal the statistical distribution of prepared nuclear spin states. Tuning the laser driving from blue to red detuned drives a transition from one to two stable states. Our results have importance for ongoing research on schemes for dynamic nuclear spin polarization, the central spin problem and control of spin coherence.

5 pages, 4 figures

References in corpus (5)

• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath
• Environment-assisted quantum control of a solid-state spin via coherent dark states
• Nuclear Tuning and Detuning of the Electron Spin Resonance in a Quantum Dot
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Cited by in corpus (3)

• Improving a solid-state qubit through an engineered mesoscopic environment
• Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation
• Direct high resolution resonant Raman scattering measurements of InAs quantum dot dynamic nuclear spin polarization states