Naslov
Kinetic glass behavior in the Edwards-Anderson model with mobile bonds

Autori
Čapeta, Davor ; Sunko, Denis K.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
MECO 31 31st Conference of the Middle European Cooperation in Statistical Physics 23-26 April 2006 Primošten, Croatia / - , 2006

Skup
31st Conference of the Middle European Cooperation in Statistical Physics

Mjesto i datum
Primošten, Hrvatska, 23.04.2006. - 26.04.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
glass transitions; random models

Sažetak
Two properties of the Edwards-Anderson model with mobile bonds are investigated which are characteristic of kinetic glass simulations. One is the two-temperature violation of the fluctuation-dissipation theorem, which can be tuned by bond dilution in a bimodal bond distribution through the full range of behavior reported in the literature. The limit of no dilution corresponds to the single temperature case, without FDT violation. For a Gaussian bond distribution, the many-temperature behavior is obtained. The other is two-time relaxation in aged systems with a Gaussian bond distribution, where a significant difference is observed between spin and bond autocorrelation functions. The spin subsystem does not show two-time behavior and the relaxation is stretched exponential with b ≈ 0.8. At the same time the bond subsystem shows two-time behavior, with the first (fast) relaxation nearly exponential, and the second (slow) a stretched exponential. Spin relaxation times coincide with the slow bond relaxation times. We conclude that simple Glauber Monte Carlo evolution of the mobile-bond Edwards-Anderson model without extraneous constraints reproduces the behavior of classical kinetic simulations, with the bond (spin) degree of freedom simulating configurational (orientational) disorder.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA