Finite-size effects on the phase diagram of difermion condensates in two-dimensional four-fermion interaction models

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.025001· OSTI ID:21513077

Abreu, L M; Malbouisson, J M. C. ^[1]; Malbouisson, A P. C. ^[2]

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1. Instituto de Fisica, Universidade Federal da Bahia, 40210-340, Salvador, BA (Brazil)
2. Centro Brasileiro de Pesquisas Fisicas, MCT, 22290-180, Rio de Janeiro, RJ (Brazil)

We investigate finite-size effects on the phase structure of chiral and difermion condensates at finite temperature and density in the framework of the two-dimensional large-N Nambu-Jona-Lasinio model. We take into account size-dependent effects by making use of zeta-function and compactification methods. The thermodynamic potential and the gap equations for the chiral and difermion condensed phases are then derived in the mean-field approximation. Size-dependent critical lines separating the different phases are obtained considering antiperiodic boundary conditions for the spatial coordinate.

• OSTI ID: 21513077
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevD.83.025001; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
BOUNDARY CONDITIONS
CHIRALITY
COMPACTIFICATION
COORDINATES
DENSITY
FERMI INTERACTIONS
MEAN-FIELD THEORY
PHASE DIAGRAMS
SIMULATION
TWO-DIMENSIONAL CALCULATIONS
BASIC INTERACTIONS
CALCULATION METHODS
DIAGRAMS
INFORMATION
INTERACTIONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
WEAK INTERACTIONS