Ground state properties of a homogeneous 2D system of Bosons with dipolar interactions
Abstract
The ground-state phase properties of a two-dimensional Bose system with dipole-dipole interactions is studied by means of quantum Monte Carlo techniques. Limitations of mean-field theory in a two-dimensional geometry are discussed. A quantum phase transition from gas to solid is found. Crystal is tested for existence of a supersolid in the vicinity of the phase transition. Existence of mesoscopic analogue of the off-diagonal long-range order is shown in the one-body density matrix in a finite-size crystal. Non-zero superfluid fraction is found in a finite-size crystal, the signal being dramatically increased in presence of vacancies.
Keywords
Cite
@article{arxiv.0707.4630,
title = {Ground state properties of a homogeneous 2D system of Bosons with dipolar interactions},
author = {G. E. Astrakharchik and J. Boronat and J. Casulleras and I. L. Kurbakov and Yu. E. Lozovik},
journal= {arXiv preprint arXiv:0707.4630},
year = {2017}
}
Comments
Contribution to RPMBT14 conference. To be published in a volume of the Series on Advances in Quantum Many-Body by World Scientific