Phase diagram of dilute nuclear matter: Unconventional pairing and the BCS-BEC crossover

Abstract

We report on a comprehensive study of the phase structure of cold, dilute nuclear matter featuring a SD condensate at non-zero isospin asymmetry, within wide ranges of temperatures and densities. We find a rich phase diagram comprising three superfluid phases, namely a Larkin-Ovchinnikov-Fulde-Ferrell phase, the ordinary BCS phase, and a heterogeneous, phase-separated BCS phase, with associated crossovers from the latter two phases to a homogeneous or phase-separated Bose-Einstein condensate of deuterons. The phase diagram contains two tricritical points (one a Lifshitz point), which may degenerate into a single tetracritical point for some degree of isospin asymmetry.

v2: 5 pages, 2 figures, published version; v1: 11 pages, 2 figures, uses RevTex

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Cited by in corpus (7)

• BCS-BEC crossovers and unconventional phases in dilute nuclear matter
• Polarized Fermi gases at finite temperature in the BCS-BEC crossover
• Cooper quartet correlations in infinite symmetric nuclear matter
• Dineutron correlations and BCS-BEC crossover in nuclear matter with the Gogny pairing force
• Nonequilibrium BCS-BEC crossover and unconventional FFLO superfluid in a strongly interacting driven-dissipative Fermi gas
• Phase diagrams of neutron-proton superfluid in asymmetric nuclear matter
• Vortex lattice in spin-imbalanced unitary Fermi gas