One of the most interesting directions in theoretical high-energy and condensed-matter
physics is understanding dynamical properties of collective states of quantum field theories.
The most elementary tool in this quest is retarded equilibrium correlators governing the
linear response theory. In this article we examine tensor networks as a way of determining
them in a fully ab initio way in a class of (1+ 1)-dimensional quantum field theories arising as
infrared descriptions of quantum Ising chains. We show that, complemented with signal …

From spin chains to real-time thermal field theory using tensor networks | CiNii Research …
From spin chains to real-time thermal field theory using tensor networks …