Ground state of a homogeneous Bose gas: A diffusion Monte Carlo calculation
1999; American Physical Society; Volume: 60; Issue: 6 Linguagem: Inglês
10.1103/physreva.60.5129
ISSN1538-4446
AutoresS. Giorgini, J. Boronat, J. Casulleras,
Tópico(s)Physics of Superconductivity and Magnetism
ResumoWe 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.
Referência(s)