Adiabatically changing the phase-space density of a trapped Bose gas
arXiv:physics/9611026 · doi:10.1103/PhysRevLett.78.990
Abstract
We show that the degeneracy parameter of a trapped Bose gas can be changed adiabatically in a reversible way, both in the Boltzmann regime and in the degenerate Bose regime. We have performed measurements on spin-polarized atomic hydrogen in the Boltzmann regime demonstrating reversible changes of the degeneracy parameter (phase-space density) by more than a factor of two. This result is in perfect agreement with theory. By extending our theoretical analysis to the quantum degenerate regime we predict that, starting close enough to the Bose-Einstein phase transition, one can cross the transition by an adiabatic change of the trap shape.
arXiv comment4 pages, 3 figures, Latex, submitted to PRL
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