Far-from-equilibrium universality in the two-dimensional Heisenberg model.

ABSTRACT: We characterize the universal far-from-equilibrium dynamics of the two-dimensional quantum Heisenberg magnet isolated from its environment. For a broad range of initial conditions, we find a long-lived universal prethermal regime characterized by self-similar behavior of spin-spin correlations. We analytically derive the spatial-temporal scaling exponents and find excellent agreement with numerics using phase space methods. The scaling exponents are insensitive to the choice of initial conditions, which include coherent and incoherent spin states with values of total magnetization and energy in a wide range. Compared to previously studied self-similar dynamics in nonequilibrium O(n) field theories and Bose gases, we find qualitatively distinct scaling behavior originating from the p

SUBMITTER: Rodriguez-Nieva JF 

PROVIDER: S-EPMC9282433 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature