Yang-Yang thermodynamics on an atom chip

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.

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

References in corpus (5)

• Non-equilibrium coherence dynamics in one-dimensional Bose gases
• Dynamical density-density correlations in the one-dimensional Bose gas
• Guided Quasicontinuous Atom Laser
• Quasi-1D Bose-Einstein condensates in the dimensional crossover regime
• Experimental evidence for the breakdown of a Hartree-Fock approach in a weakly interacting Bose gas

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