Quantum phase transition for the BEC--BCS crossover in condensed matter physics and CPT violation in elementary particle physics

Details Quantum phase transition for the BEC--BCS crossover in condensed matter physics and CPT violation in elementary particle physics Quantum phase transition for the BEC--BCS crossover in condensed matter physics and CPT violation in elementary particle physics

2004-07-22

arxiv.org/abs/cond-mat/0407597v3

Pisma Zh.Eksp.Teor.Fiz. 80 (2004) 389-394; JETP Lett. 80 (2004) 343-347

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 1 figure, v3: published version

Scientific paper

10.1134/1.1825119

We 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.

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