Quantum Monte Carlo simulation of a two-dimensional Bose gas
Other Condensed Matter
2009-11-10 v1
Abstract
The equation of state of a homogeneous two-dimensional Bose gas is calculated using quantum Monte Carlo methods. The low-density universal behavior is investigated using different interatomic model potentials, both finite-ranged and strictly repulsive and zero-ranged supporting a bound state. The condensate fraction and the pair distribution function are calculated as a function of the gas parameter, ranging from the dilute to the strongly correlated regime. In the case of the zero-range pseudopotential we discuss the stability of the gas-like state for large values of the two-dimensional scattering length, and we calculate the critical density where the system becomes unstable against cluster formation.
Keywords
Cite
@article{arxiv.cond-mat/0411049,
title = {Quantum Monte Carlo simulation of a two-dimensional Bose gas},
author = {S. Pilati and J. Boronat and J. Casulleras and S. Giorgini},
journal= {arXiv preprint arXiv:cond-mat/0411049},
year = {2009}
}
Comments
6 pages, 5 figures, 1 table