Rejuvenation and Memory in Migdal-Kadanoff Spin Glasses

Details Rejuvenation and Memory in Migdal-Kadanoff Spin Glasses Rejuvenation and Memory in Migdal-Kadanoff Spin Glasses

2003-10-09

arxiv.org/abs/cond-mat/0310198v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 3 figures, 1 table, proceedings of The 3rd International Symposium on Slow Dynamics in Complex Systems, Sendai, Japan

Scientific paper

We study aging phenomena of Migdal-Kadanoff spin glasses in order to clarify relevancy of temperature chaos to rejuvenation and memory. By exploiting renormalization, we do efficient dynamical simulations in very wide time/length scales including the chaos length. As a consequence, we find that temperature chaos and temperature dependence of speed of equilibration cause two significantly different effects against temperature variations, i.e., rejuvenation for positive temperature variation and memory for negative temperature variation, as are observed experimentally in spin glasses.

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