Cooling of a One-Dimensional Bose Gas

We experimentally study the dynamics of a degenerate one-dimensional Bose gas that is subject to a continuous outcoupling of atoms. Although standard evaporative cooling is rendered ineffective by the absence of thermalizing collisions in this system, we observe substantial cooling. This cooling pro...

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Published inPhysical review letters Vol. 116; no. 3; p. 030402
Main Authors Rauer, B, Grišins, P, Mazets, I E, Schweigler, T, Rohringer, W, Geiger, R, Langen, T, Schmiedmayer, J
Format Journal Article
LanguageEnglish
Published United States 22.01.2016
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Summary:We experimentally study the dynamics of a degenerate one-dimensional Bose gas that is subject to a continuous outcoupling of atoms. Although standard evaporative cooling is rendered ineffective by the absence of thermalizing collisions in this system, we observe substantial cooling. This cooling proceeds through homogeneous particle dissipation and many-body dephasing, enabling the preparation of otherwise unexpectedly low temperatures. Our observations establish a scaling relation between temperature and particle number, and provide insights into equilibration in the quantum world.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.116.030402