Vortex lattice in rotating neutron spin-triplet superfluid

Abstract

In the Ginzburg-Landau limit, a possible texture without singular cores in a rotating neutron spin-triplet superfluid is studied. It is constructed the lattice of non-singular vortices with a vorticity diffusely distributed over the entire unit cell. The upper limit of the free energy associated with this structure is estimated, and the result shows that non-singular vortices are more preferable in the core of rotating neutron stars than ordinary linear singular vortices. The order parameter of the studied neutron system belongs to the unitary class. This implies that the superfluid under consideration does not have spin polarization and the core-less ${}^3$P${}_2$ vortices do not have magnetization, which makes electron scattering by vortices ineffective. For the same reason, pinning with flux tubes is also suppressed. This can affect the hydrodynamics of superfluid neutron stars.

arXiv comment7 pages, 5 figures

References in corpus (8)

• Physics of Neutron Star Crusts
• Superfluidity in nuclear systems and neutron stars
• Superfluidity and Superconductivity in Neutron Stars
• Pinning down the superfluid and measuring masses using pulsar glitches
• Superfluidity and Superconductivity in Neutron Stars
• Magnetic Properties of Quantized Vortices in Neutron ${}^3{P}_2$ Superfluids in Neutron Stars
• The role of mass, equation of state and superfluid reservoir in large pulsar glitches
• Flux-Vortex Pinning and Neutron Star Evolution

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• Continuous gravitational wave emission from neutron stars with pinned superfluids in the core
• Statistical estimates of the pulsar glitch activity
• Spin-polarized phases of ${}^3{P}_2$ superfluids in neutron stars
• Core structures of vortices in Ginzburg-Landau theory for neutron ${}^3{P}_2$ superfluids
• Proximity effects of vortices in neutron ${}^3{P}_2$ superfluids in neutron stars: Vortex core transitions and covalent bonding of vortex molecules
• Symmetry classification of uniform states in spin-2 Bose-Einstein condensates and neutron ${}^3{P}_2$ superfluids
• Emergent chirality and superfluidity of parity-doubled baryons in neutron stars