Yang-Yang thermodynamics on an atom chip

Details Yang-Yang thermodynamics on an atom chip Yang-Yang thermodynamics on an atom chip

2007-09-12

arxiv.org/abs/0709.1899v2

Phys. Rev. Lett. 100 (2008) 090402

Physics

Condensed Matter

Other Condensed Matter

extended introduction and conclusions, and minor changes throughout; accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.090402

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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