2 papers
cond-mat.supr-con2019
A variational approach for many-body systems at finite temperature
Tao Shi, Eugene Demler, J. Ignacio Cirac
We introduce a non-linear differential flow equation for density matrices that provides a monotonic decrease of the free energy and reaches a fixed point at the Gibbs thermal state…
hep-lat2018
Variational study of U(1) and SU(2) lattice gauge theories with Gaussian states in 1+1 dimensions
P. Sala, T. Shi, S. Kühn +3
We introduce a method to investigate the static and dynamic properties of both Abelian and non-Abelian lattice gauge models in 1+1 dimensions. Specifically, we identify a set of tr…