The equilibrium state of a trapped two-dimensional Bose gas

Details The equilibrium state of a trapped two-dimensional Bose gas The equilibrium state of a trapped two-dimensional Bose gas

2010-03-23

arxiv.org/abs/1003.4545v1

Phys. Rev. A 82, 013609 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.82.013609

We study experimentally and numerically the equilibrium density profiles of a trapped two-dimensional $^{87}$Rb Bose gas, and investigate the equation of state of the homogeneous system using the local density approximation. We find a clear discrepancy between in-situ measurements and Quantum Monte Carlo simulations, which we attribute to a non-linear variation of the optical density of the atomic cloud with its spatial density. However, good agreement between experiment and theory is recovered for the density profiles measured after time-of-flight, taking advantage of their self-similarity in a two-dimensional expansion.

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