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28 March 2024
 
  » pubmed » pmid16090447

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Quantum phase transitions across a p-wave Feshbach resonance
V Gurarie ; L Radzihovsky ; A V Andreev ;
Date 17 Jun 2005
Journal Phys Rev Lett, 94 (23), 230403
AbstractWe 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 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.
Source PubMed, pmid16090447
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