Artículos de revistas
From conformal invariance to quasistationary states
Journal of Statistical Mechanics, Bristol : Institute of Physics - IOP, v. 2011, p. P09030-1-P09030-21, Sept. 2011
Alcaraz, Francisco Castilho
In a conformal invariant one-dimensional stochastic model, a certain nonlocal perturbation takes the system to a new massless phase of a special kind. The ground-state of the system is an adsorptive state. Part of the finite-size scaling spectrum of the evolution Hamiltonian stays unchanged but some levels go exponentially to zero for large lattice sizes, becoming degenerate with the ground-state. As a consequence one observes the appearance of quasistationary states which have a relaxation time which grows exponentially with the size of the system. Several initial conditions have singled out a quasistationary state which has in the finite-size scaling limit the same properties as the stationary state of the conformal invariant model.