Flow Equations for the BCS-BEC Crossover
Superconductivity
2009-11-13 v2 Statistical Mechanics
High Energy Physics - Phenomenology
Quantum Physics
Abstract
The functional renormalisation group is used for the BCS-BEC crossover in gases of ultracold fermionic atoms. In a simple truncation, we see how universality and an effective theory with composite bosonic di-atom states emerge. We obtain a unified picture of the whole phase diagram. The flow reflects different effective physics at different scales. In the BEC limit as well as near the critical temperature, it describes an interacting bosonic theory.
Cite
@article{arxiv.cond-mat/0701198,
title = {Flow Equations for the BCS-BEC Crossover},
author = {S. Diehl and H. Gies and J. M. Pawlowski and C. Wetterich},
journal= {arXiv preprint arXiv:cond-mat/0701198},
year = {2009}
}
Comments
4 pages, 4 figures