Phase fluctuations in dilute Bose gases
Abstract
We improve on the Popov theory for partially Bose-Einstein condensed atomic gases by treating the phase fluctuations exactly. As a result, the theory becomes valid in arbitrary dimensions and is able to describe the low-temperature crossover between three, two and one-dimensional Bose gases, which is currently being explored experimentally. When applied to a degenerate two-dimensional atomic hydrogen gas, we find reasonable agreement with recent experimental data for the reduction of the three-body recombination rate.Keywords
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