N-conserving Bogoliubov vacuum of a two component Bose-Einstein condensate: Density fluctuations close to a phase separation condition

Details N-conserving Bogoliubov vacuum of a two component Bose-Einstein condensate: Density fluctuations close to a phase separation condition N-conserving Bogoliubov vacuum of a two component Bose-Einstein condensate: Density fluctuations close to a phase separation condition

2007-01-10

arxiv.org/abs/cond-mat/0701212v2

J. Phys. A: Math. Theor. 41 (2008) 145005

Physics

Condensed Matter

Other Condensed Matter

12 pages, 5 figures, published version

Scientific paper

10.1088/1751-8113/41/14/145005

Two-component Bose-Einstein condensates are considered within a number conserving version of the Bogoliubov theory. We show that the Bogoliubov vacuum state can be obtained in the particle representation in a simple form. We predict considerable density fluctuations in finite systems close to the phase-separation regime. We analyze homogeneous condensates and condensates in a double-well potential.

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