Quantum Dynamics of Collective Spin States in a Thermal Gas
arXiv:2006.04243 · doi:10.1103/PhysRevA.102.012822
Abstract
Ensembles of alkali or noble-gas atoms at room temperature and above are widely applied in quantum optics and metrology owing to their long-lived spins. Their collective spin states maintain nonclassical nonlocal correlations, despite the atomic thermal motion in the bulk and at the boundaries. Here we present a stochastic, fully-quantum description of the effect of atomic diffusion in these systems. We employ the Bloch-Heisenberg-Langevin formalism to account for the quantum noise originating from diffusion and from various boundary conditions corresponding to typical wall coatings, thus modeling the dynamics of nonclassical spin states with spatial inter-atomic correlations. As examples, we apply the model to calculate spin noise spectroscopy, temporal relaxation of squeezed spin states, and the coherent coupling between two spin species in a hybrid system.
References in corpus (8)
- Quantum teleportation between light and matter
- New limit on Lorentz and CPT-violating neutron spin interactions
- Quantum memory for entangled two-mode squeezed states
- Long-lived entanglement generation of nuclear spins using coherent light
- Spin noise spectroscopy beyond thermal equilibrium and linear response
- Theory of Dicke narrowing in coherent population trapping
- Correlation function of spin noise due to atomic diffusion
- Universal Spectra of Coherent Atoms in a Recurrent Random Walk
Cited by in corpus (10)
- Hot atomic vapors for nonlinear and quantum optics
- Coupling light to a nuclear spin gas with a two-photon linewidth of five millihertz
- Effects of spin-exchange collisions on the fluctuation spectra of hot alkali-metal vapors
- Quantum battery based on dipole-dipole interaction and external driving field
- Inter-species spin-noise correlations in hot atomic vapors
- Anomalous noise spectra in a spin-exchange-relaxation-free alkali-metal vapor
- Acoustic frequency atomic spin oscillator in the quantum regime
- Squeezed light from an oscillator measured at the rate of oscillation
- Suppressing the Decoherence of Alkali-Metal Spins at Low Magnetic Fields
- Optical pumping and relaxation of atomic population in assorted conditions