Bulk viscosity coefficients due to phonons and kaons in superfluid color-flavor locked quark matter

Abstract

We evaluate the three bulk viscosity coefficients ${\zeta }_1,{\zeta }_2$ and ${\zeta }_3$ in the color-flavor locked (CFL) superfluid phase due to phonons and kaons, which are the lightest modes in that system. We first show that the computation is rather analogous to the computation of the same coefficients in superfluid ${}^4$He, as due to phonons and rotons. For astrophysical applications, we also find the value of the viscosities when there is a periodic disturbance, and the viscosities also depend on the frequency of the disturbance. In a temperature regime that might be of astrophysical relevance, we find that the contributions of both the phonons and kaons should be considered, and that ${\zeta }_2$ is much less that the same coefficient in unpaired quark matter

13 pages, 6 figures; Explanations and one reference added; version to be published in Phys. Rev. D

References in corpus (6)

• Color superconductivity in dense quark matter
• Bulk viscosity of superfluid neutron stars
• Bulk viscosity due to kaons in color-flavor-locked quark matter
• Bulk viscosity in a cold CFL superfluid
• Mutual friction in a cold color flavor locked superfluid and r-mode instabilities in compact stars
• Transport theory for cold relativistic superfluids from an analogue model of gravity

Cited by in corpus (5)

• Isospin Equilibration in Neutron Star Mergers
• Damping of density oscillations from bulk viscosity in quark matter
• Transport properties of superfluid phonons in neutron stars
• Burgers equation for the bulk viscous pressure of quark matter
• Projecting the likely importance of weak-interaction-driven bulk viscosity in neutron star mergers