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APS » Journals » Phys. Rev. Lett. » Volume 91 » Issue 25
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Phys. Rev. Lett. 91, 250403 (2003) [4 pages]

Quantitative Test of Thermal Field Theory for Bose-Einstein Condensates

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S. A. Morgan1, M. Rusch2, D. A. W. Hutchinson3, and K. Burnett2
1Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
2Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
3Department of Physics, University of Otago, P.O. Box 56, Dunedin, New Zealand

Received 22 May 2003; published 18 December 2003

We present numerical results from a second-order quantum field theory of Bose-Einstein condensates applied to the 1997 JILA experiment [ D. S. Jin Phys. Rev. Lett. 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 behavior of the m=0 mode is due to experimental perturbation of the noncondensate. The theory is gapless and includes the coupled dynamics of the condensate and thermal cloud, the anomalous pair average, and all relevant finite size effects.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.250403
DOI:
10.1103/PhysRevLett.91.250403
PACS:
03.75.Kk, 05.30.Jp, 67.40.Db
 
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