Quantum phase transitions across p-wave Feshbach resonance
Abstract
We study a single-species polarized Fermi gas tuned across a narrow p-wave Feshbach resonance. We show that in the course of a BEC-BCS crossover the system can undergo a magnetic field-tuned quantum phase transition from a p_x-wave to a p_x+i p_y-wave superfluid. The latter state, that spontaneously breaks time-reversal symmetry, furthermore undergoes a topological p_x+ i p_y to p_x+ i p_y transition at zero chemical potential \mu. In two-dimensions, for \mu>0 it is characterized by a Pfaffian ground state exhibiting topological order and non-Abelian excitations familiar from fractional quantum Hall systems.
Keywords
Cite
@article{arxiv.cond-mat/0410620,
title = {Quantum phase transitions across p-wave Feshbach resonance},
author = {V. Gurarie and L. Radzihovsky and A. V. Andreev},
journal= {arXiv preprint arXiv:cond-mat/0410620},
year = {2009}
}
Comments
Fig. 1(a) changed to reflect a correction of a mistake in the previous version of the manuscript. We credit Chi-Ho Cheng and S.-K. Yip, cond-mat/0504278, for this correction (see Note Added for details)