Dissipative processes in superfluid quark matter
M. Mannarelli, G. Colucci, C. Manuel
TL;DR
This paper investigates dissipative processes in superfluid quark matter relevant for compact stars, focusing on phonon transport properties and introducing a new mechanism called 'rocket term' affecting stellar oscillations.
Contribution
It provides new calculations of bulk viscosity, shear viscosity, and thermal conductivity of phonons in high-density quark matter, and introduces the 'rocket term' as a novel dissipative process.
Findings
Phonon transport properties are characterized at low temperatures and high densities.
The 'rocket term' can influence superfluid r-mode oscillations in compact stars.
New quantitative values for viscosities and thermal conductivity are presented.
Abstract
We present some results about dissipative processes in fermionic superfluids that are relevant for compact stars. At sufficiently low temperatures the transport properties of a superfluid are dominated by phonons. We report the values of the bulk viscosity, shear viscosity and thermal conductivity of phonons in quark matter at extremely high density and low temperature. Then, we present a new dissipative mechanism that can operate in compact stars and that is named "rocket term". The effect of this dissipative mechanism on superfluid r-mode oscillations is sketched.
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