Spin temperature concept verified by optical magnetometry of nuclear spins

Abstract

We develop a method of non-perturbative optical control over adiabatic remagnetisation of the nuclear spin system and apply it to verify the spin temperature concept in GaAs microcavities. The nuclear spin system is shown to exactly follow the predictions of the spin-temperature theory, despite the quadrupole interaction that was earlier reported to disrupt nuclear spin thermalisation. These findings open a way to deep cooling of nuclear spins in semiconductor structures, with a prospect of realisation of nuclear spin-ordered statesfor high fidelity spin-photon interfaces.

arXiv comment7 pages, 4 figures

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Cited by in corpus (11)

• Statistical Mechanics of Systems with Negative Temperature
• Warm-up spectroscopy of quadrupole-split nuclear spins in n-GaAs epitaxial layers
• Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures
• Raman scattering model of the spin noise
• Unveiling the electron-nuclear spin dynamics in an n-doped InGaAs epilayer by spin noise spectroscopy
• Kinetic approach to the nuclear-spin polaron formation
• Subsecond nuclear spin dynamics in $n$-GaAs
• Slowly generated anomalously large nuclear field in bulk n-AlGaAs
• Nonlinear high-frequency magnetic response of magnetoferritin metacrystals governed by spin thermodynamics
• Nuclear spin polaron-formation: anisotropy effects and quantum phase transition
• Deep optical cooling of coupled nuclear spin-spin and quadrupole reservoirs in a GaAs/(Al,Ga)As quantum well