Collapsing Bose-Einstein condensates beyond the Gross-Pitaevskii approximation
Date
2005
Authors
Wuester, Sebastian
Hope, Joseph
Savage, Craig
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
We analyze quantum field models of the bosenova experiment, in which85Rb 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.
Description
Keywords
Keywords: Bose-Einstein condensates; Feshbach resonance; Gross-Pitaevskii approximation; Hartree-Fock Bogoliubov (HFB) equations; Approximation theory; Computer simulation; Gas condensates; Numerical analysis; Parameter estimation; Perturbation techniques; Quantum
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Source
Physical Review A: Atomic, Molecular and Optical Physics
Type
Journal article