Equilibrium state of a trapped two-dimensional Bose gas

Steffen P. Rath, Tarik Yefsah, Kenneth J. Günter, Marc Cheneau, Rémi Desbuquois, Markus Holzmann, Werner Krauth, Jean Dalibard
2010 Physical Review A. Atomic, Molecular, and Optical Physics  
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
more » ... theory is recovered for the density profiles measured after time-of-flight, taking advantage of their self-similarity in a two-dimensional expansion.
doi:10.1103/physreva.82.013609 fatcat:fpl2grnqnzbnnhmdfnrlrle4sq