Towards solving the sign problem: tensor networks for lattice gauge theories

by Karl Jansen (DESY Zeuthen)

Wednesday 23 Nov 2016, 14:30 → 15:30 Europe/Berlin

build. 2a, SR 2 (DESY Hamburg)

A number of important phenomena in nature such as the physics of the early universe, heavy ion collisions or CP violation require a non-perturbative analysis thus calling for Latte Field Theorie methods. However, these phenomena are described by complex actions rendering standard Markov Chain Monte Carlo methods impossible. In this talk, I will discuss the tensor network state (TNS) approach to lattice gauge theory and present results for the spectrum and thermal properties of the 1+1 dimensional Schwinger model. In addition, the model is evaluated in presence of a chemical potential and it is demonstration that the TNS technique can overcome the sign problem for this case providing thus a promising prospect for future computations.