IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Low-temperature Glauber dynamics under weak competing interactions
Autor/es:
M. D. GRYNBERG
Revista:
PHYSICAL REVIEW E - STATISTICAL PHYSICS, PLASMAS, FLUIDS AND RELATED INTERDISCIPLINARY TOPICS
Editorial:
American Physical Society
Referencias:
Lugar: Ridge, New York; Año: 2015 vol. 91 p. 1 - 9
ISSN:
1063-651X
Resumen:
We consider the low but nonzero temperature regimes of the Glauber dynamics in a chain of Ising spins with first- and second-neighbor interactions J1,  J2.  For 0 < -J2 /|J1 | < 1 it is known that at T = 0  the dynamics is both metastable and noncoarsening, while being always ergodic and coarsening in the limit of T = 0+ . Based on finite-size scaling analyses of relaxation times, here we argue that in that latter situation the asymptotic kinetics of small or weakly frustrated -J2 /| J1| ratios is characterized by an almost ballistic dynamic exponent z = 1.03(2) and arbitrarily slow velocities of growth. By contrast, for noncompeting interactions the coarsening length scales are estimated to be almost diffusive.