The critical temperature of a trapped, weakly interacting Bose gas

Details The critical temperature of a trapped, weakly interacting Bose gas The critical temperature of a trapped, weakly interacting Bose gas

2003-07-09

arxiv.org/abs/cond-mat/0307188v2

Phys. Rev. Lett. 92 (2004) 030405

Physics

Condensed Matter

version 2, 20 octobre 2003

Scientific paper

10.1103/PhysRevLett.92.030405

We report on measurements of the critical temperature of a harmonically trapped, weakly interacting Bose gas as a function of atom number. Our results exclude ideal-gas behavior by more than two standard deviations, and agree quantitatively with mean-field theory. At our level of sensitivity, we find no additional shift due to critical fluctuations. In the course of this measurement, the onset of hydrodynamic expansion in the thermal component has been observed. Our thermometry method takes this feature into account.

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