Non-equilibrium dynamics of fluctuations in an ultra-cold atomic mixture
arXiv:2204.06456 · doi:10.1103/PhysRevA.107.L031302
Abstract
We investigate an ultra-cold mixture of Bose gases interacting via spin-changing collisions by studying the dynamics of spin fluctuations. The experimental implementation employs Na and Li atoms, which are prepared out of equilibrium across a wide range of initial conditions. We identify three regimes in the dynamics of the system for different initial states: a long-lived metastable regime, an instability range with strong growth of fluctuations, and a fast relaxing regime approaching thermal equilibrium. Theoretical modelling of the data allows us to reconstruct effective potentials which characterize the different dynamical regimes of the system.
arXiv comment9 pages, 5 figures
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