Quantum phase transitions across a p-wave feshbach resonance

V. Gurarie, L. Radzihovsky, A. V. Andreev

Research output: Contribution to journalArticlepeer-review

210 Citations (Scopus)

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 Bose-Einstein condensation (BEC)-BCS crossover, the system can undergo a magnetic-field-tuned quantum phase transition from a px-wave to a px+ipy-wave superfluid. The latter state, that spontaneously breaks time-reversal symmetry, furthermore undergoes a topological px+ipy to px+ipy transition at zero chemical potential μ. In two dimensions, for μ>0 it is characterized by a Pfaffian ground state exhibiting topological order and non-Abelian excitations familiar from fractional quantum Hall systems.

Original languageEnglish
Article number230403
JournalPhysical Review Letters
Volume94
Issue number23
DOIs
Publication statusPublished - 17 Jun 2005
Externally publishedYes

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