Yang-Yang thermodynamics on an atom chip
Other Condensed Matter
2010-10-21 v2
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.
Cite
@article{arxiv.0709.1899,
title = {Yang-Yang thermodynamics on an atom chip},
author = {A. H. van Amerongen and J. J. P. van Es and P. Wicke and K. V. Kheruntsyan and N. J. van Druten},
journal= {arXiv preprint arXiv:0709.1899},
year = {2010}
}
Comments
extended introduction and conclusions, and minor changes throughout; accepted for publication in Phys. Rev. Lett