The critical endpoint between two nematic phases of neutron 3P2 superfluids shows critical exponents (α≈0.6, β≈0.4, γ≈0.5, δ≈2.3) that the authors interpret as evidence of a new universality class.
Spin Polarization and Color Superconductivity in Quark Matter
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abstract
A coexistent phase of spin polarization and color superconductivity in high-density QCD is investigated using a self-consistent mean-field method at zero temperature. The axial-vector current stemming from the Fock exchange term of the one-gluon-exchange interaction has a central role to cause spin polarization. The magnitude of spin polarization is determined by the coupled Schwinger-Dyson equation with a superconducting gap function. As a significant feature the Fermi surface is deformed by the axial-vector self-energy and then rotational symmetry is spontaneously broken. The gap function is also taken to be anisotropic in accordance with the deformation. As a result of numerical calculation, it is found that spin polarization barely conflicts with color superconductivity, but almost coexists with it.
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Critical endpoint and universality class of neutron $^3P_2$ superfluids in neutron stars
The critical endpoint between two nematic phases of neutron 3P2 superfluids shows critical exponents (α≈0.6, β≈0.4, γ≈0.5, δ≈2.3) that the authors interpret as evidence of a new universality class.