Dissipative dynamics and cooling rates of trapped impurity atoms immersed in a reservoir gas

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Abstract

We study the dissipative dynamics of neutral atoms in anisotropic harmonic potentials, immersed in a reservoir species that is not trapped by the harmonic potential. Considering initial motional excitation of the atoms along one direction, we explore the resulting spontaneous emission of reservoir excitations, across a range of trap parameters from strong to weak radial confinement. In different limits these processes are useful as a basis for analogies to laser cooling, or as a means to introduce controlled dissipation to many-body dynamics. For realistic experimental parameters, we analyze the distribution of the atoms during the decay and determine the effects of heating arising from a finite temperature reservoir.

Original languageEnglish
Article number033612
Number of pages14
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume101
Issue number3
DOIs
Publication statusPublished - 16 Mar 2020

Keywords

  • neutral atoms
  • anisotropic harmonic potentials
  • cold and ultracold molecules
  • atomic gases

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