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

Lena, R. G. and Daley, A. J. (2020) Dissipative dynamics and cooling rates of trapped impurity atoms immersed in a reservoir gas. Physical Review A - Atomic, Molecular, and Optical Physics, 101 (3). 033612. ISSN 1094-1622

[img]
Preview
Text (Lena-Daley-PRA-2020-Dissipative-dynamics-and-cooling-rates-of-trapped-impurity-atoms-immersed-in-a-reservoir-gas)
Lena_Daley_PRA_2020_Dissipative_dynamics_and_cooling_rates_of_trapped_impurity_atoms_immersed_in_a_reservoir_gas.pdf
Final Published Version

Download (2MB)| Preview

    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.