Supersolid state in fermionic optical lattice systems
Superconductivity
2009-11-13 v1
Abstract
We study ultracold fermionic atoms trapped in an optical lattice with harmonic confinement by combining the real-space dynamical mean-field theory with a two-site impurity solver. By calculating the local particle density and the pair potential in the systems with different clusters, we discuss the stability of a supersolid state, where an s-wave superfluid coexists with a density-wave state of checkerboard pattern. It is clarified that a confining potential plays an essential role in stabilizing the supersolid state. The phase diagrams are obtained for several effective particle densities.
Cite
@article{arxiv.0812.2231,
title = {Supersolid state in fermionic optical lattice systems},
author = {Akihisa Koga and Takuji Higashiyama and Kensuke Inaba and Seiichiro Suga and Norio Kawakami},
journal= {arXiv preprint arXiv:0812.2231},
year = {2009}
}
Comments
7 pages, 5 figures, Phys. Rev. A in press