A covariant variational approach to Yang-Mills Theory at finite temperatures

Understand

We extend the covariant variational approach for SU(N) Yang-Mills theory in Landau gauge to non-zero temperatures.

• The renormalization of the zero-temperature case is revisited and it is shown that the same counterterms are sufficient to render the low-order Green's function finite at non-zero temperature.
• We compute the ghost and gluon propagator numerically and show that it agrees in all qualitative respects with the results of high-precision lattice calculations.