BCS-BEC Crossover in Symmetric Nuclear Matter at Finite Temperature: Pairing Fluctuation and Pseudogap

Abstract

By adopting a $T$-matrix based method within $G_{0}G$ approximation for the pair susceptibility, we studied the effects of pairing fluctuation on the BCS-BEC crossover in symmetric nuclear matter. The pairing fluctuation induces a pseudogap in the excitation spectrum of nucleon in both superfluid and normal phases. The critical temperature of superfluid transition was calculated. It differs from the BCS result remarkably when density is low. We also computed the specific heat which shows a nearly ideal BEC type temperature dependence at low density but a BCS type behavior at high density. This qualitative change of the temperature dependence of specific heat may serve as a thermodynamic signal for BCS-BEC crossover.

11 pages,11 figures,1 table, published version in Phys. Rev. C.

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Critical Temperature and Thermodynamics of Attractive Fermions at Unitarity
• Coexistence of BCS and BEC-like pair structures in halo nuclei
• BCS-BEC crossover of neutron pairs in symmetric and asymmetric nuclear matter
• Pairing and Superfluid Properties of Dilute Fermion Gases at Unitarity
• Strong dineutron correlation in 8He and 18C
• Comparative Study of BCS-BEC Crossover Theories above $T_c$: the Nature of the Pseudogap in Ultra-Cold Atomic Fermi Gases
• Relativistic description of BCS-BEC crossover in nuclear matter
• BCS-BEC Crossover and Thermodynamics in Asymmetric Nuclear Matter with Pairings in Isospin I=0 and I=1 Channels
• Correlation functions for a di-neutron condensate in asymmetric nuclear matter

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