Strongly interacting bosons in a 1D optical lattice at incommensurate densities
Quantum Gases
2015-05-27 v2
Abstract
We investigate quantum phase transitions occurring in a system of strongly interacting ultracold bosons in a 1D optical lattice. After discussing the commensurate-incommensurate transition, we focus on the phases appearing at incommensurate filling. We find a rich phase diagram, with superfluid, supersolid and solid (kink-lattice) phases. Supersolids generally appear in theoretical studies of systems with long-range interactions; our results break this paradigm and show that they may also emerge in models including only short-range (contact) interactions, provided that quantum fluctuations are properly taken into account.
Keywords
Cite
@article{arxiv.1103.1860,
title = {Strongly interacting bosons in a 1D optical lattice at incommensurate densities},
author = {Achilleas Lazarides and Olivier Tieleman and Cristiane Morais Smith},
journal= {arXiv preprint arXiv:1103.1860},
year = {2015}
}