Ground state phase diagram of Gaussian-Core bosons in two dimensions
Statistical Mechanics
2016-06-01 v2
Abstract
The ground state of a two-dimensional (2D) system of Bose particles of spin zero, interacting via a repulsive Gaussian-Core potential, has been investigated by means of Quantum Monte Carlo simulations. The quantum phase diagram is qualitatively identical to that of 2D Yukawa bosons. While the system is a fluid at all densities for weak coupling, in the strong coupling regime it transitions upon compression from a low density superfluid to a crystal, and then into a reentrant superfluid phase. No evidence of a (supersolid) cluster crystal phase is seen.
Keywords
Cite
@article{arxiv.1603.07270,
title = {Ground state phase diagram of Gaussian-Core bosons in two dimensions},
author = {Peter Kroiss and Massimo Boninsegni and Lode Pollet},
journal= {arXiv preprint arXiv:1603.07270},
year = {2016}
}
Comments
5 pages, 5 figures, replaced with published version