Topological quantum phase transition in the BEC-BCS crossover phenomena
Strongly Correlated Electrons
2011-06-24 v1
Abstract
A crossover between the Bose Einstein condensation (BEC) and BCS superconducting state is described topologically in the chiral symmetric fermion system with attractive interaction. Using a local Z_2 Berry phase, we found a quantum phase transition between the BEC and BCS phases without accompanying the bulk gap closing.
Cite
@article{arxiv.1003.4735,
title = {Topological quantum phase transition in the BEC-BCS crossover phenomena},
author = {Mitsuhiro Arikawa and Isao Maruyama and Yasuhiro Hatsugai},
journal= {arXiv preprint arXiv:1003.4735},
year = {2011}
}
Comments
4 pages, 5 figures