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Dynamics of Bose-Einstein condensate with account of pair correlations

Published 16 Feb 2017 in cond-mat.stat-mech | (1702.06020v1)

Abstract: The system of dynamic equations for Bose-Einstein condensate at zero temperature with account of pair correlations is obtained. The spectrum of small oscillations of the condensate in a spatially homogeneous state is explored. It is shown that this spectrum has two branches: the sound wave branch and branch with an energy gap.

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