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23 October 2019
 
  » arxiv » cond-mat/0407597

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Quantum phase transition for the BEC--BCS crossover in condensed matter physics and CPT violation in elementary particle physics
F.R. Klinkhamer ; G.E. Volovik ;
Date 22 Jul 2004
Journal Pisma Zh.Eksp.Teor.Fiz. 80 (2004) 389-394; JETP Lett. 80 (2004) 343-347
Subject Strongly Correlated Electrons; Other; Soft Condensed Matter | cond-mat.str-el cond-mat.other cond-mat.soft hep-ph
AbstractWe discuss the quantum phase transition that separates a vacuum state with fully-gapped fermion spectrum from a vacuum state with topologically-protected Fermi points (gap nodes). In the context of condensed-matter physics, such a quantum phase transition with Fermi point splitting may occur for a system of ultracold fermionic atoms in the region of the BEC-BCS crossover, provided Cooper pairing occurs in the non-s-wave channel. For elementary particle physics, the splitting of Fermi points may lead to CPT violation, neutrino oscillations, and other phenomena.
Source arXiv, cond-mat/0407597
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