Effects of Interactions on the Critical Temperature of a Trapped Bose Gas
arXiv:1104.0890 · doi:10.1103/PhysRevLett.106.250403
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.
arXiv comment4 pages, 4 figures
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