Key points are not available for this paper at this time.
A procedure is given for renormalization of finite-temperature and -density Green's functions to all orders of perturbation theory. The Lagrangian counterterms are independent of temperature, density, and all mass parameters of the Lagrangian. Thus renormalization-group equations may be written for Green's functions in a medium for which the Callan-Symanzik functions depend only on the dimensionless coupling constants. By scaling the temperature and/or chemical potential in the renormalization-group equations it is shown that asymptotic freedom in non-Abelian gauge theories occurs for large temperatures (early hot universe) and for large chemical potential (high density of the medium) as well as large momenta.
Kislinger et al. (Sat,) studied this question.