FFLO- and N\'eel States in finite-size Systems
Quantum Gases
2011-04-01 v1 Quantum Physics
Abstract
The general structure of the -wave fermionic superfluid pairing order parameter is discussed for systems in thermal equilibrium. We demonstrate that for finite-size systems with fixed boundary conditions the pairing-amplitude may always be chosen as a {\it real} function in space, in contrast to systems underlying periodic boundary conditions, with drastical consequences for several postulated Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states. Using a simple mapping, we also investigate the consequences of our results for antiferromagnetic equilibrium states in a repulsive Hubbard model.
Cite
@article{arxiv.1103.6183,
title = {FFLO- and N\'eel States in finite-size Systems},
author = {T. Gottwald and P. G. J. van Dongen},
journal= {arXiv preprint arXiv:1103.6183},
year = {2011}
}
Comments
6 pages, 4 figures