Global persistence exponent for nonequilibrium critical dynamics
Global persistence exponent for nonequilibrium critical dynamics
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DOI:
10.1103/physrevlett.77.3704
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发表时间:
1996-10-28
影响因子:
8.6
通讯作者:
Sire, C
中科院分区:
文献类型:
--
作者:
Majumdar, SN;Bray, AJ;Sire, C
A ''persistence exponent'' theta is defined for nonequilibrium critical phenomena. It describes the probability, p(t) similar to t(-theta), that the global order parameter has not changed sign in the time interval t following a quench to the critical point from a disordered state. This exponent is calculated in mean-field theory, in the n = infinity limit of the O(n) model, to first order in epsilon = 4 - d, and for the 1D Ising model. Numerical results are obtained for the 2D Ising model. We argue that theta is a new independent exponent.