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arXiv · 0709.1899

Yang-Yang thermodynamics on an atom chip

A. H. van Amerongen·J. J. P. van Es·P. Wicke·K. V. Kheruntsyan·N. J. van Druten
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Abstract

We investigate the behavior of a weakly interacting nearly one-dimensional (1D) trapped Bose gas at finite temperature. We perform in situ measurements of spatial density profiles and show that they are very well described by a model based on exact solutions obtained using the Yang-Yang thermodynamic formalism, in a regime where other, approximate theoretical approaches fail. We use Bose-gas focusing [Shvarchuck etal., Phys. Rev. Lett. 89, 270404 (2002)] to probe the axial momentum distribution of the gas, and find good agreement with the in situ results.

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A. H. van Amerongen, J. J. P. van Es, P. Wicke, K. V. Kheruntsyan, N. J. van Druten. 2008-02-08. Yang-Yang thermodynamics on an atom chip. https://doi.org/10.1103/physrevlett.100.090402

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