Heidelberg 1999 – scientific programme

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SYBE: Symposium Laserkühlung und Bose-Einstein-Kondensation

SYBE 3: Symposium Laserkühlung und Bose-Einstein-Kondensation Poster

SYBE 3.3: Poster

Thursday, March 18, 1999, 16:30–18:30, PH

Precision Monte Carlo test of the Hartree-Fock approximation for a trapped Bose gas — •Markus Holzmann¹, Werner Krauth¹, and Martin Naraschewski² — ¹LPS et LKB de l’ENS, 24, rue Lhomond, F-75005 Paris — ²Jefferson Laboratory, Department of Physics, Harvard University, Cambridge MA 02138, USA

We compare the semiclassical Hartree-Fock approximation for a trapped Bose gas to a direct Path Integral Quantum Monte Carlo simulation. The chosen parameters correspond to current ⁸⁷Rb experiments. We observe corrections to the mean-field density profile: the Path Integral calculation reveals an increase of the number of condensed particles, which is of the same order as a previously computed result for a homogeneous system. We discuss the experimental observability of the effect and propose a method to analyze data of in-situ experiments.