Nuclear spin diffusion in the central spin system of a GaAs/AlGaAs quantum dot
arXiv:2208.02037 · doi:10.1038/s41467-023-38349-0
Abstract
The spin diffusion concept provides a classical description of a purely quantum-mechanical evolution in inhomogeneously polarized many-body systems such as nuclear spin lattices. The central spin of a localized electron alters nuclear spin diffusion in a way that is still poorly understood. In contrast to previous predictions, we show experimentally that in GaAs/AlGaAs quantum dots the electron spin accelerates nuclear spin diffusion, without forming any Knight field gradient barrier. Such acceleration is present even at high magnetic fields, which we explain as a result of electron spin-flip fluctuations. Diffusion-limited nuclear spin lifetimes range between 1 and 10 s, providing plenty of room for recent proposals seeking to store and process quantum information using quantum dot nuclear spins.
References in corpus (35)
- Unbounded growth of entanglement in models of many-body localization
- A bright and fast source of coherent single photons
- Quantum memories: emerging applications and recent advances
- A solid-state entangled photon pair source with high brightness and indistinguishability
- Nuclear spin physics in quantum dots: an optical investigation
- Dissipative Phase Transition in Central Spin Systems
- Coherent single electron spin control in a slanting Zeeman field
- Knight Field Enabled Nuclear Spin Polarization in Single Quantum Dots
- Low-Noise GaAs Quantum Dots for Quantum Photonics
- Emergent thermodynamics in a quenched quantum many-body system
- Orientation independent room-temperature optical 13C hyperpolarization in powdered diamond
- Dynamic nuclear polarization and spin-diffusion in non-conducting solids
- Spectrum of the Nuclear Environment for GaAs Spin Qubits
- Ideal refocusing of an optically active spin qubit under strong hyperfine interactions
- High resolution nuclear magnetic resonance spectroscopy of highly-strained quantum dot nanostructures
- Quadrupolar induced suppression of nuclear spin bath fluctuations in self-assembled quantum dots
- Direct Measurement of Quantum Dot Spin Dynamics using Time-Resolved Resonance Fluorescence
- Measurement of the spin temperature of optically cooled nuclei and GaAs hyperfine constants in GaAs/AlGaAs quantum dots
- Quadrupolar spectra of nuclear spins in strained InGaAs quantum dots
- Collective quantum memory activated by a driven central spin
- Hyperfine interaction dominated dynamics of nuclear spins in self-assembled quantum dots
- Nuclear spin cooling using Overhauser field selective coherent population trapping
- Critical Behavior of Nuclear-Spin Diffusion in GaAs/AlGaAs Heterostructures near Landau Level Filling ν=1
- Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
- Nuclear spin diffusion in semiconductor nanostructures: Effects of inhomogeneous hyperfine interactions
- Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
- Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot
- Polarization freezing of 10000 optically-cooled nuclear spins by coupling to a single electron
- Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe
- Electron and nuclear spin properties of the nanohole-filled GaAs/AlGaAs quantum dots
- Nuclear spin relaxation in n-GaAs: from insulating to metallic regime
- Optically tunable nuclear magnetic resonance in a single quantum dot
- Dynamics of Overhauser Field under nuclear spin diffusion in a quantum dot
- Cross-calibration of GaAs deformation potentials and gradient-elastic tensors using photoluminescence and nuclear magnetic resonance spectroscopy in GaAs/AlGaAs quantum dot structures
- Interlayer Diffusion of Nuclear Spin Polarization in Quantum Hall States
Cited by in corpus (7)
- Enhanced Electron Spin Coherence in a GaAs Quantum Emitter
- Approaching a fully-polarized state of nuclear spins in a semiconductor quantum dot
- Electron-to-nuclear spectral mapping via "Galton board" dynamic nuclear polarization
- Quantum non-demolition measurement of an electron spin qubit through its low-energy many-body spin environment
- Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
- Hole spin coherence in InAs/InAlGaAs self-assembled quantum dots emitting at telecom wavelengths
- Slowly generated anomalously large nuclear field in bulk n-AlGaAs