Adiabatically Changing the Phase-Space Density of a Trapped Bose Gas

Journal Article · Sat Feb 01 00:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.990· OSTI ID:450456

Pinkse, P; Mosk, A; Weidemueller, M; Reynolds, M; Hijmans, T; Walraven, J ^[1]

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1. Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65/67, 1018 XE Amsterdam (The Netherlands)

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 2. This result is in good 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. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 450456
• Journal Information: Physical Review Letters, Vol. 78, Issue 6; Other Information: PBD: Feb 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOSE-EINSTEIN GAS
PHASE TRANSFORMATIONS
ADIABATIC PROCESSES
PHASE SPACE
DENSITY
TRAPS
SPIN
HYDROGEN
POLARIZATION
BOLTZMANN STATISTICS