Condensate fluctuations of a trapped, ideal Bose gas

Details Condensate fluctuations of a trapped, ideal Bose gas Condensate fluctuations of a trapped, ideal Bose gas

1996-06-11

arxiv.org/abs/quant-ph/9606009v2

Phys.Rev.A54:5048-5054,1996

Physics

Quantum Physics

16 pages (REVTeX) plus 4 figures (ps), revision includes brief comparison of repulsive-interaction vs. fixed-N fluctuation dam

Scientific paper

10.1103/PhysRevA.54.5048

For a non-self-interacting Bose gas with a fixed, large number of particles confined to a trap, as the ground state occupation becomes macroscopic, the condensate number fluctuations remain micrscopic. However, this is the only significant aspect in which the grand canonical description differs from canonical or microcanonical in the thermodynamic limit. General arguments and estimates including some vanishingly small quantities are compared to explicit, fixed-number calculations for 10^2 to 10^6 particles.

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