Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Bulk viscosities of a cold relativistic superfluid: Color-flavor locked quark matter

Bulk viscosities of a cold relativistic superfluid: Color-flavor locked quark matter We consider the phonon contribution to the bulk viscosities ζ 1 , ζ 2 and ζ 3 of a cold relativistic superfluid. We assume the low temperature T regime and that the transport properties of the system are dominated by the phonons. We use kinetic theory in the relaxation time approximation and the low energy effective field theory of the corresponding system. The parametric dependence of the bulk viscosity coefficients is fixed once the equation of state is specified, and the phonon dispersion law to cubic order in momentum is known. We first present a general discussion, valid for any superfluid, then we focus on the color-flavor locked superfluid because all the parameters needed in the analysis can be computed in the high density limit of QCD, and also because of the possible astrophysical applications. For the three independent bulk viscosity coefficients we find that they scale with the temperature as ζ i ∼ 1 / T , and that in the conformal limit only the third coefficient ζ 3 is nonzero. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Bulk viscosities of a cold relativistic superfluid: Color-flavor locked quark matter

Physical Review D , Volume 81 (4) – Feb 15, 2010
11 pages

Loading next page...
 
/lp/american-physical-society-aps/bulk-viscosities-of-a-cold-relativistic-superfluid-color-flavor-locked-USWexgKorq

References (59)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2010 The American Physical Society
ISSN
1550-2368
DOI
10.1103/PhysRevD.81.043002
Publisher site
See Article on Publisher Site

Abstract

We consider the phonon contribution to the bulk viscosities ζ 1 , ζ 2 and ζ 3 of a cold relativistic superfluid. We assume the low temperature T regime and that the transport properties of the system are dominated by the phonons. We use kinetic theory in the relaxation time approximation and the low energy effective field theory of the corresponding system. The parametric dependence of the bulk viscosity coefficients is fixed once the equation of state is specified, and the phonon dispersion law to cubic order in momentum is known. We first present a general discussion, valid for any superfluid, then we focus on the color-flavor locked superfluid because all the parameters needed in the analysis can be computed in the high density limit of QCD, and also because of the possible astrophysical applications. For the three independent bulk viscosity coefficients we find that they scale with the temperature as ζ i ∼ 1 / T , and that in the conformal limit only the third coefficient ζ 3 is nonzero.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Feb 15, 2010

There are no references for this article.