Turning the BEC-BCS crossover into a transition by radiation
Quantum Gases
2015-05-20 v1
Abstract
We show that the Bardeen-Cooper-Schrieffer state (BCS) and the Bose-Einstein condensation (BEC) sides of the BCS-BEC crossover can be rigorously distinguished from each other by the extrema of the spectrum of the fermionic excitations. Moreover, we demonstrate that this formal distinction is realized as a non-equilibrium phase transition under radio frequency radiation. The BEC phase remains translationally invariant, whereas the BCS phase transforms into the supersolid phase. For a two-dimensional system this effect occurs at arbitrary small amplitude of the radiation field.
Cite
@article{arxiv.1505.04820,
title = {Turning the BEC-BCS crossover into a transition by radiation},
author = {Y. Lemonik and I. L. Aleiner and B. L. Altshuler},
journal= {arXiv preprint arXiv:1505.04820},
year = {2015}
}
Comments
4 pages, 4 figures and supplemental material