Confinement vs Deconfinement of Cooper Pairs in One-Dimensional Spin-3/2 Fermionic Cold Atoms
Strongly Correlated Electrons
2007-05-23 v2 Superconductivity
Abstract
The phase diagram of spin-3/2 fermionic cold atoms trapped in a one-dimensional optical lattice is investigated at quarter filling (one atom per site) by means of large-scale numerical simulations. In full agreement with a recent low-energy approach, we find two phases with confined and deconfined Cooper pairs separated by an Ising quantum phase transition. The leading instability in the confined phase is an atomic-density wave with subdominant quartet superfluid instability made of four fermions. Finally, we reveal the existence of a bond-ordered Mott insulating phase in some part of the repulsive regime.
Keywords
Cite
@article{arxiv.cond-mat/0612456,
title = {Confinement vs Deconfinement of Cooper Pairs in One-Dimensional Spin-3/2 Fermionic Cold Atoms},
author = {S. Capponi and G. Roux and P. Azaria and E. Boulat and P. Lecheminant},
journal= {arXiv preprint arXiv:cond-mat/0612456},
year = {2007}
}
Comments
Published version with minor changes; 4 pages, 7 figures