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arXiv · 1104.0890

Effects of Interactions on the Critical Temperature of a Trapped Bose Gas

Robert P. Smith·Robert L. D. Campbell·Naaman Tammuz·Zoran Hadzibabic
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Abstract

We perform high-precision measurements of the condensation temperature of a harmonically-trapped atomic Bose gas with widely-tuneable interactions. For weak interactions we observe a negative shift of the critical temperature in excellent agreement with mean-field theory. However for sufficiently strong interactions we clearly observe an additional positive shift, characteristic of beyond-mean-field critical correlations. We also discuss non-equilibrium effects on the apparent critical temperature for both very weak and very strong interactions.

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Robert P. Smith, Robert L. D. Campbell, Naaman Tammuz, Zoran Hadzibabic. 2011-04-05. Effects of Interactions on the Critical Temperature of a Trapped Bose Gas. https://doi.org/10.1103/physrevlett.106.250403

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