Speaker
Prof.
Kurt Langfeld
(Plymouth University)
Description
Dense matter quantum field theory is hampered by the notorious sign-problem: the Gibbs factor is not (semi-)positive definite and standard Monte-Carlo simulations are not applicable. We propose to perform Monte-Carlo sampling with respect to the density of states, which is positive even for dense matter systems. I showcase this approach for a SU(2) gauge theory at finite densities of heavy quarks. I then address the Z3 spin model at finite chemical potentials, which features a strong sign problem.
