BEC-BCS crossover and the liquid-gas phase transition in hot and dense nuclear matter

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.024911· OSTI ID:21419454

Meng, Jin ^[1]; Urban, Michael ^[2]; Schuck, Peter ^[2]

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1. Institute of Particle Physics and Physics Department, Hua-Zhong Normal University, Wuhan 4300079 (China)
2. Institut de Physique Nucleaire, CNRS/IN2P3 and Universite Paris-Sud 11, F-91406 Orsay Cedex (France)

The effect of nucleon-nucleon correlations in symmetric nuclear matter at finite temperature is studied beyond BCS theory. Starting from a Hartree-Fock description of nuclear matter with the Gogny effective interaction, we add correlations corresponding to the formation of preformed pairs and scattering states above the superfluid critical temperature within the in-medium T-matrix approach, which is analogous to the Nozieres-Schmitt-Rink theory. We calculate the critical temperature for a BEC superfluid of deuterons, of a BCS superfluid of nucleons, and in the crossover between these limits. The effect of the correlations on thermodynamic properties (equation of state, energy, entropy) and the liquid-gas phase transition is discussed. Our results show that nucleon-nucleon correlations beyond BCS play an important role for the properties of nuclear matter, especially in the low-density region.

• OSTI ID: 21419454
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevC.82.024911; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
CORRELATIONS
CRITICAL TEMPERATURE
DENSITY
DEUTERONS
ENTROPY
EQUATIONS OF STATE
HARTREE-FOCK METHOD
INTERACTIONS
NUCLEAR MATTER
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PHASE TRANSFORMATIONS
S MATRIX
SCATTERING
SIMULATION
SUPERFLUIDITY
SYMMETRY
APPROXIMATIONS
BARYON-BARYON INTERACTIONS
BARYONS
CALCULATION METHODS
CHARGED PARTICLES
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
MATRICES
MATTER
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE