Overlap Fluctuations from Random Overlap Structures

Details Overlap Fluctuations from Random Overlap Structures Overlap Fluctuations from Random Overlap Structures

2006-07-24

arxiv.org/abs/cond-mat/0607615v2

Journal of Mathematical Physics 217610JMP (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

18 pages

Scientific paper

We investigate overlap fluctuations of the Sherrington-Kirkpatrick mean field spin glass model in the framework of the Random Over- lap Structure (ROSt). The concept of ROSt has been introduced recently by Aizenman and coworkers, who developed a variational approach to the Sherrington-Kirkpatrick model. We propose here an iterative procedure to show that, in the so-called Boltzmann ROSt, Aizenman-Contucci (AC) polynomials naturally arise for almost all values of the inverse temperature (not in average over some interval only). The same results can be obtained in any ROSt, including therefore the Parisi structure. The AC polynomials impose restric- tions on the overlap fluctuations in agreement with Parisi theory.

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