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Paper detail

Yang-Yang thermodynamics on an atom chip

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.

preprint2008arXivOpen access
A. H. van AmerongenJ. J. P. van EsP. WickeK. V. KheruntsyanN. J. van Druten
cond-mat.other
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A. H. van AmerongenJ. J. P. van EsP. WickeK. V. KheruntsyanN. J. van Druten

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