Competition and duality correspondence between inhomogeneous fermion-antifermion and fermion-fermion condensations in the NJL2 modelстатья
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Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
Аннотация:We investigate the possibility of spatially homogeneous and
inhomogeneous chiral fermion-antifermion condensation and
superconducting fermion-fermion pairing in the (1+1)-dimensional model
by Chodos et al. [Phys. Rev. D 61, 045011 (2000)] generalized to
continuous chiral invariance. The consideration is performed at
nonzero values of temperature T, electric charge chemical potential μ
and chiral charge chemical potential μ5. It is shown that at G1<G2,
where G1 and G2 are the coupling constants in the fermion-antifermion
and fermion-fermion channels, the (μ,μ5)-phase structure of the model
is in a one-to-one correspondence with the phase structure at G1>G2
(called duality correspondence). Under the duality transformation the
(inhomogeneous) chiral symmetry breaking (CSB) phase is mapped into
the (inhomogeneous) superconducting (SC) phase and vice versa. If
G1=G2, then the phase structure of the model is
self-dual. Nevertheless, the degeneracy between the CSB and SC phases
is possible in this case only when there is a spatial inhomogeneity of
condensates.