Document Type

Article

Publication Date

August 2012

Publication Title

Physical Review A

Volume

86

Issue Number

2

DOI

10.1103/PhysRevA.86.023633

Disciplines

Astrophysics and Astronomy | Physical Sciences and Mathematics | Physics

Abstract

We study the onset of particle statistics effects as the temperature is lowered in strongly correlated two-dimensional Hubbard models. We utilize numerical linked-cluster expansions and focus on the properties of interacting lattice fermions and two-component hard-core bosons. In the weak-coupling regime, where the ground state of the bosonic system is a superfluid, the thermodynamic properties of the two systems at half filling exhibit very large differences even at high temperatures. In the strong-coupling regime, where the low-temperature behavior is governed by a Mott insulator for either particle statistics, the agreement between the thermodynamic properties of both systems extends to regions where the antiferromagnetic (iso)spin correlations are exponentially large. We analyze how particle statistics affects adiabatic cooling in those systems.

Comments

This article originally appeared in Physical Review A, volume 86, issue 2, 2012, published by the American Physical Society. ©2012 American Physical Society. The article can also be found online at this link.
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