Speaker
Description
We discuss a recently introduced strategy to study non-perturbatively thermal QCD
up to temperatures of the order of the electro-weak scale, combining step scaling
techniques and shifted boundary conditions. The former allow to renormalize the
theory for a range of scales which spans several orders of magnitude with a moderate
computational cost. Shifted boundary conditions remove the need for the zero
temperature subtraction in the Equation of State. As a consequence, the simulated
lattices do not have to accommodate two very different scales, the pion mass and
the temperature, at the very same spacing. Effective field theory arguments
guarantee that finite volume effects can be kept under control safely.
The entire strategy has been implemented by discretizing fermions with the O(a)-improved Wilson–Dirac operator. This is a theoretically-sound regularization which enjoys de-facto automatic O(a)-improvement at high temperature. Several computations, carried out with the proposed strategy, are underway and will be presented in other (related) talks to this conference.
