Exact pairing correlations in one-dimensional trapped fermions with stochastic mean-field wave-functions
Statistical Mechanics
2009-11-10 v2
Abstract
The canonical thermodynamic properties of a one-dimensional system of interacting spin-1/2 fermions with an attractive zero-range pseudo-potential are investigated within an exact approach. The density operator is evaluated as the statistical average of dyadics formed from a stochastic mean-field propagation of independent Slater determinants. For an harmonically trapped Fermi gas and for fermions confined in a 1D-like torus, we observe the transition to a quasi-BCS state with Cooper-like momentum correlations and an algebraic long-range order. For few trapped fermions in a rotating torus, a dominant superfluid component with quantized circulation can be isolated.
Cite
@article{arxiv.cond-mat/0311437,
title = {Exact pairing correlations in one-dimensional trapped fermions with stochastic mean-field wave-functions},
author = {Olivier Juillet and Francesca Gulminelli and Philippe Chomaz},
journal= {arXiv preprint arXiv:cond-mat/0311437},
year = {2009}
}