4 papers
Aspects of Non-Equilibrium Dynamics in Quantum Field Theory
E. Manfredini
This work is devoted to the study of relaxation--dissipation processes in systems described by Quantum Field Theory. In the first part, I focus on the phi^4 scalar quantum field th…
The O(infty) nonlinear sigma model out of equilibrium
C. Destri, E. Manfredini
The out-of-equilibrium dynamics of the O(N+1) nonlinear sigma model in 1+1 dimensions is investigated in the large N limit. Regarding the nonlinearity as the effect of a suitable l…
Out-of-equilibrium dynamics of ϕ^4 QFT in finite volume
C. Destri, E. Manfredini
The model in a finite volume is studied in the infinite limit and within a non-gaussian Hartree-Fock approximation both at equilibrium and out of equilibrium, with parti…
The limit of O(n) model on graphs
Raffaella Burioni, Davide Cassi, Claudio Destri
Thirty years ago, Stanley showed that an O(n) spin model on a lattice tends to a spherical model as . This means that at any temperature the corresponding free energies…