Self-reliant cooling of ultracold atoms

Jianying Du, Tong Fu, Jingyi Chen, Shanhe Su and Jincan Chen

Physica A: Statistical Mechanics and its Applications, 2022, vol. 586, issue C

Abstract: A self-reliant quantum cooler without an external control is proposed. To understand the thermal transport properties of the quantum system interacting with the baths described by the grand canonical ensemble, a two-level system with a single energy transport channel and a two-level coupled system with multi-channels are established. By considering the temperature dependence of the chemical potentials of the ultracold atom baths, the steady-state heat flows, particle currents, and entropy productions of these systems are derived. Results show that a steady heat current flows against the thermal bias for a nonequilibrium system coupled with ultracold quantum gases and the cooling rate can be enhanced by quantum coherence.

Keywords: Ultracold atomic gases; Grand-canonical ensembles; The distribution function; Quantum cooler; Cooling rate (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:586:y:2022:i:c:s0378437121007482

DOI: 10.1016/j.physa.2021.126475

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