Relaxation in kinetic models on alternating linear chains

Details Relaxation in kinetic models on alternating linear chains Relaxation in kinetic models on alternating linear chains

2000-09-29

arxiv.org/abs/cond-mat/0009457v1

Physics

Condensed Matter

10 pages, 5 separate figures

Scientific paper

10.1103/PhysRevE.63.026114

A restricted dynamics, previously introduced in a kinetic model for relaxation phenomena in linear polymer chains, is used to study the dynamic critical exponent of one-dimensional Ising models. Both the alternating isotopic chain and the alternating-bond chain are considered. In contrast with what occurs for the Glauber dynamics, in these two models the dynamic critical exponent turns out to be the same. The alternating isotopic chain with the restricted dynamics is shown to lead to Nagel scaling for temperatures above some critical value. Further support is given relating the Nagel scaling to the existence of multiple (simultaneous) relaxation processes, the dynamics apparently not playing the most important role in determining such scaling.

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