Quantum-Phase Transitions of Interacting Bosons and the Supersolid Phase
Abstract
We investigate the properties of strongly interacting bosons in two dimensions at zero temperature using mean-field theory, a variational Ansatz for the ground state wave function, and Monte Carlo methods. With on-site and short-range interactions a rich phase diagram is obtained. Apart from the homogeneous superfluid and Mott-insulating phases, inhomogeneous charge-density wave phases appear, that are stabilized by the finite-range interaction. Furthermore, our analysis demonstrates the existence of a supersolid phase, in which both long-range order (related to the charge-density wave) and off-diagonal long-range order coexist. We also obtain the critical exponents for the various phase transitions.
Keywords
Cite
@article{arxiv.cond-mat/9508065,
title = {Quantum-Phase Transitions of Interacting Bosons and the Supersolid Phase},
author = {Anne van Otterlo and Karl-Heinz Wagenblast and Reinhard Baltin and C. Bruder and Rosario Fazio and Gerd Schön},
journal= {arXiv preprint arXiv:cond-mat/9508065},
year = {2009}
}
Comments
RevTex, 20 pages, 10 PostScript figures included