Time decay of the remanent magnetization in the $\pm J$ spin glass model at T=0

Details Time decay of the remanent magnetization in the $\pm J$ spin glass model at T=0 Time decay of the remanent magnetization in the $\pm J$ spin glass model at T=0

2001-03-19

arxiv.org/abs/cond-mat/0103382v4

PRE 63, 066111-1/4

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 3 figures

Scientific paper

10.1103/PhysRevE.63.066111

Using the zero-temperature Metropolis dynamics, the time decay of the remanent magnetization in the $\pm J$ Edward-Anderson spin glass model with a uniform random distribution of ferromagnetic and antiferromagnetic interactions has been investigated. Starting from the saturation, the magnetization per spin $m$ reveals a slow decrease with time, which can be approximated by a power law:$m(t)=m_{\infty}+ ({t\over a_{0}})^{a_{1}}$, $a_{1} < 0$. Moreover, its relaxation does not lead it into one of the ground states, and therefore the system is trapped in metastable isoenergetic microstates remaining magnetized. Such behaviour is discussed in terms of a random walk the system performs on its available configuration space.

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