%0 Journal Article 
%A Fernández Melgarejo, José
%A Molina Vilaplana, Javier
%A Torrente Lujan, E
%T Entanglement renormalization for interacting field theories
%D 2019
%@ 2470-0029
%U http://hdl.handle.net/10317/9414
%X A general method to build the entanglement renormalization (cMERA) for interacting quantum field theories is presented. We improve upon the well-known Gaussian formalism used in free theories through a class of variational non-Gaussian wave functionals for which expectation values of local operators can be efficiently calculated analytically and in a closed form. The method consists of a series of scale-dependent nonlinear canonical transformations on the fields of the theory under consideration. Here, the lambda phi(4) and the sine-Gordon scalar theories are used to illustrate how nonperturbative effects far beyond the Gaussian approximation are obtained by considering the energy functional and the correlation functions of the theory.
%K Física Aplicada
%K 21 Astronomía y Astrofísica
%~ GOEDOC, SUB GOETTINGEN