Dynamics of a mesoscopic nuclear spin ensemble interacting with an optically driven electron spin

Abstract

The ability to discriminate between simultaneously occurring noise sources in the local environment of semiconductor InGaAs quantum dots, such as electric and magnetic field fluctuations, is key to understanding their respective dynamics and their effect on quantum dot coherence properties. We present a discriminatory approach to all-optical sensing based on two-color resonance fluorescence of a quantum dot charged with a single electron. Our measurements show that local magnetic field fluctuations due to nuclear spins in the absence of an external magnetic field are described by two correlation times, both in the microsecond regime. The nuclear spin bath dynamics show a strong dependence on the strength of resonant probing, with correlation times increasing by a factor of four as the optical transition is saturated. We interpret the behavior as motional averaging of both the Knight field of the resident electron spin and the hyperfine-mediated nuclear spin-spin interaction due to optically-induced electron spin flips.

arXiv comment13 pages, 12 figures. Version 2 similar to published version in PRB

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Cited by in corpus (17)

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• Exploring Dephasing of a Solid-State Quantum Emitter via Time- and Temperature- Dependent Hong-Ou-Mandel Experiments
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• Dynamic nuclear polarization as kinetically constrained diffusion
• Frequency stabilization of the zero-phonon line of a quantum dot via phonon-assisted active feedback
• Solid effect DNP polarization dynamics in a system of many spins
• Fibre based hyperentanglement generation for dense wavelength division multiplexing
• Non-local nuclear spin quieting in quantum dot molecules: Optically-induced extended two-electron spin coherence time
• Generating indistinguishable photons from a quantum dot in a noisy environment
• Two-laser dynamic nuclear polarization with semiconductor electrons: feedback, suppressed fluctuations, and bistability near two-photon resonance
• Polarization-dependent interference between dipole moments of a resonantly excited quantum dot
• Loschmidt echo driven by hyperfine and electric-quadrupole interactions in nanoscale nuclear spin baths
• Delaying two-photon Fock-states in a hot cesium vapor using on-demand generated single-photons from a semiconductor quantum dot
• Manipulating single photon emitter radiative lifetime in transition-metal dichalcogenides through Forster resonance energy transfer to graphene
• Direct high resolution resonant Raman scattering measurements of InAs quantum dot dynamic nuclear spin polarization states
• Intrinsic limit to electron spin coherence in InGaAs quantum dots featuring strain-induced nuclear dispersion