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Quantitative test of thermal field theory for Bose-Einstein condensates

S. A. Morgan·M. Rusch·D. A. W. Hutchinson·K. Burnett
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Abstract

We present numerical results from a full second order quantum field theory of Bose-Einstein condensates applied to the 1997 JILA experiment [D. S. Jin et al., Phys. Rev. Lett. Vol. 78, 764 (1997)]. Good agreement is found for the energies and decay rates for both the lowest-energy m = 2 and m = 0 modes. The anomalous behaviour of the m = 0 mode is due to experimental perturbation of the non-condensate. The theory includes the coupled dynamics of the condensate and thermal cloud, the anomalous pair average and all relevant finite size effects.

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S. A. Morgan, M. Rusch, D. A. W. Hutchinson, K. Burnett. 2003-05-22. Quantitative test of thermal field theory for Bose-Einstein condensates. https://doi.org/10.1103/physrevlett.91.250403

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