The chiral critical point from the strong coupling expansion

Abstract

The strong coupling expansion for staggered fermions allows for Monte Carlo simulations using a dual representation. It has a mild sign problem for low values of the inverse gauge coupling ${\hat{I}}^2$, hence the phase diagram in the full $\hat{I}{¼}_B-T$ plane can be evaluated. We have extended this framework to include $\mathcal{O}({\hat{I}}^2)$ and $\mathcal{O}(β^2)$ corrections, by mapping the degrees of freedom to a vertex model. We present results on the ${\hat{I}}^2$-dependence of the chiral critical point from those simulations.

10 pages, 5 figures, talk presented at the 41st International Symposium on Lattice Field Theory (LATTICE2024), July 28th - August 3rd, 2024, The University of Liverpool