One-dimensional phase transitions in a two-dimensional optical lattice

A phase transition for bosonic atoms in a two-dimensional anisotropic optical lattice is considered. If the tunnelling rates in two directions are different, the system can undergo a transition between a two-dimensional superfluid and a one-dimensional Mott insulating array of strongly coupled tubes...

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Bibliographic Details
Published in:arXiv.org 2008-05
Main Authors: Rehn, Magnus, Bergkvist, Sara, Rosengren, Anders, Saers, Robert, Zelán, Martin, Lundh, Emil, Kastberg, Anders
Format: Article
Language:English
Subjects:
Bosons
Computer simulation
Fluids
Optical lattices
Phase transitions
Properties (attributes)
Superfluidity
Tubes
Online Access:Get full text
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Summary:A phase transition for bosonic atoms in a two-dimensional anisotropic optical lattice is considered. If the tunnelling rates in two directions are different, the system can undergo a transition between a two-dimensional superfluid and a one-dimensional Mott insulating array of strongly coupled tubes. The connection to other lattice models is exploited in order to better understand the phase transition. Critical properties are obtained using quantum Monte Carlo calculations. These critical properties are related to correlation properties of the bosons and a criterion for commensurate filling is established.
ISSN:2331-8422
DOI:10.48550/arxiv.0805.0227