Spin excitonic and diffusive modes in superfluid Fermi liquids
arXiv:1108.5899 · doi:10.1103/PhysRevC.84.068801
Abstract
A role of a particle-particle p-wave spin interaction in Fermi liquids with s-wave pairing is studied. Depending on the sign of the interaction there arises either the new exciton collective mode below the pair-breaking threshold or the diffusive excitation mode above the threshold. The Landau parameters which control the interaction strength are evaluated for various systems: the dilute fermion gases, degenerate electron liquid, metals, atomic nuclei and neutron matter. The interaction removes also the square-root singularity in the phase space of pair breaking processes. It is shown how these effects influence the neutrino emissivity in the neutron Cooper-pair recombinations in neutron stars.
4 pages 3 figures
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Cited by in corpus (5)
- Superfluidity in nuclear systems and neutron stars
- Nuclear medium cooling scenario in the light of new Cas A cooling data and the 2 M_sun pulsar mass measurements
- Cooling of neutron stars in "nuclear medium cooling scenario" with stiff equation of state including hyperons
- Spin Response and Neutrino Emissivity of Dense Neutron Matter
- Response functions of cold neutron matter: density, spin and current fluctuations