The four-loop frontier of dense QCD and beyond

by Kaapo Seppänen (University of Bern)

Tuesday 20 Oct 2026, 11:00 → 12:00 Europe/Zurich

40/4-C01 (CERN)

The equation of state of QCD at high baryon densities plays an important role in understanding the physics of neutron-star interiors. In this talk, I will discuss our recent completion of the four-loop pressure of cold quark matter, focusing on the computational challenges and the methods developed to overcome them. In particular, I will highlight the development of thermal Loop-Tree Duality as a powerful framework for automated numerical multiloop calculations. I will also present our recent four-loop calculation of the hot Yang–Mills pressure at order g^6, demonstrating the broader applicability of this method to nonzero temperatures.