Collapsing Bose-Einstein condensates beyond the Gross-Pitaevskii approximation

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We analyse quantum field models of the bosenova experiment, in which $^{85}$Rb Bose-Einstein condensates were made to collapse by switching their atomic interactions from repulsive to attractive. Specifically, we couple the lowest order quantum field correlation functions to the Gross-Pitaevskii function, and solve the resulting dynamical system numerically. Comparing the computed collapse times with the experimental measurements, we find that the calculated times are much larger than the measured values. The addition of quantum field corrections does not noticeably improve the agreement compared to a pure Gross-Pitaevskii theory.
8 pages, 4 figures

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Other Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/25399

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0412041
 http://arxiv.org/abs/cond-mat/0412041
 Phys. Rev. A 71, 033604 (2005)
 doi:10.1103/PhysRevA.71.033604

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arXiv