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Effective nuclear temperature in a fluctuating spin system
E. Bertin, J. A. Hodges, J. -P. Bouchaud +3
We report on very low temperature (27 mK) Mossbauer absorption spectra on Gd 155 in the Heisenberg frustrated antiferromagnets Gd2 Sn2 O7 (GdSn) and Gd2 Ti2 O7. We show that electr…
Renormalization Group Approach To Error-Correcting Codes
Jonathan Yedidia, Jean-Philippe Bouchaud
We explain an algorithm that approximately but efficiently assesses particular parity-check error-correcting codes of large, but finite, blocklength. This algorithm is based on the…
Separation of time and length scales in spin-glasses: temperature as a microscope
Jean-Philippe Bouchaud, Vincent Dupuis, Jacques Hammannn +1
We summarize the different puzzles raised by aging experiments of spin-glasses and their various interpretations. We try to reconcile the `real space', droplet like pictures with t…
Rejuvenation in the Random Energy Model
Marta Sales, Jean-Philippe Bouchaud
We show that the Random Energy Model has interesting rejuvenation properties in its frozen phase. Different `susceptibilities' to temperature changes, for the free-energy and for o…