Phase-fluctuating 3D condensates in elongated traps

Details Phase-fluctuating 3D condensates in elongated traps Phase-fluctuating 3D condensates in elongated traps

2001-04-19

arxiv.org/abs/cond-mat/0104373v2

Phys. Rev. Lett. 87, 050404 (2001)

Physics

Condensed Matter

Statistical Mechanics

5 pages REVTeX, 3 figures, misprints corrected

Scientific paper

10.1103/PhysRevLett.87.050404

We find that in very elongated 3D trapped Bose gases, even at temperatures far below the BEC transition temperature Tc, the equilibrium state will be a 3D condensate with fluctuating phase (quasicondensate). At sufficiently low temperatures the phase fluctuations are suppressed and the quasicondensate turns into a true condensate. The presence of the phase fluctuations allows for extending thermometry of Bose-condensed gases well below those established in current experiments.

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