Ground state of a homogeneous Bose gas: a diffusion Monte Carlo calculation

Details Ground state of a homogeneous Bose gas: a diffusion Monte Carlo calculation Ground state of a homogeneous Bose gas: a diffusion Monte Carlo calculation

1999-02-12

arxiv.org/abs/cond-mat/9902185v1

Physics

Condensed Matter

4 pages Latex, 4 postscript figures

Scientific paper

10.1103/PhysRevA.60.5129

We use a diffusion Monte Carlo method to calculate the lowest energy state of a uniform gas of bosons interacting through different model potentials, both strictly repulsive and with an attractive well. We explicitly verify that at low density the energy per particle follows a universal behavior fixed by the gas parameter na^3. In the regime of densities typical for experiments in trapped Bose-condensed gases, the corrections to the mean-field energies greatly exceed the differences due to the details of the potential.

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