Phase diagram of the Bose-Hubbard model on a ring-shaped lattice with tunable weak links
Quantum Gases
2013-10-07 v2
Abstract
Motivated by recent experiments on toroidal Bose-Einstein condensates in all-optical traps with tunable weak links, we study the one-dimensional Bose-Hubbard model on a ring-shaped lattice with a small region of weak hopping integrals using quantum Monte Carlo simulations. Besides the usual Mott insulating and superfluid phases, we find a phase which is compressible but non superfluid with a local Mott region. This `local Mott' phase extends in a large region of the phase diagram. These results suggest that the insulating and conducting phases can be tuned by a local parameter which may provide a new insight to the design of atomtronic devices.
Keywords
Cite
@article{arxiv.1210.5745,
title = {Phase diagram of the Bose-Hubbard model on a ring-shaped lattice with tunable weak links},
author = {Kalani Hettiarachchilage and Valéry G. Rousseau and Ka-Ming Tam and Mark Jarrell and Juana Moreno},
journal= {arXiv preprint arXiv:1210.5745},
year = {2013}
}
Comments
5 pages, 5 figures