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Nature of the spin-glass phase at experimental length scales

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Fernández Pérez, Luis Antonio y Martín Mayor, Víctor y Muñoz Sudupe, Antonio y otros, ... (2010) Nature of the spin-glass phase at experimental length scales. Journal of statistical mechanics: theory and experiment . ISSN 1742-5468

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URL Oficial: http://doi.org/10.1088/1742-5468/2010/06/P06026




Resumen

We present a massive equilibrium simulation of the three-dimensional Ising spin glass at low temperatures. The Janus special-purpose computer has allowed us to equilibrate, using parallel tempering, L = 32 lattices down to T ≈ 0.64Tc. We demonstrate the relevance of equilibrium finite-size simulations to understand experimental non-equilibrium spin glasses in the thermodynamical limit by establishing a time-length dictionary. We conclude that non-equilibrium experiments performed on a time scale of one hour can be matched with equilibrium results on L ≈ 110 lattices. A detailed investigation of the probability distribution functions of the spin and link overlap, as well as of their correlation functions, shows that Replica Symmetry Breaking is the appropriate theoretical framework for the physically relevant length scales. Besides, we improve over existing methodologies to ensure equilibration in parallel tempering simulations.


Tipo de documento:Artículo
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© 2010 IOP Publishing Ltd and SISSA. Artículo firmado por 21 autores. We acknowledge support from MICINN, Spain, through research contracts No. TEC2007- 64188, FIS2006-08533-C03, FIS2007-60977, FIS2009-12648-C03 and from UCM-Banco de Santander. BS and DY are FPU fellows (Spain) and RAB and JM-G are DGA fellows. SPG was supported by FECYT (Spain). The authors would like to thank the Arénaire team, especially J Detrey and F de Dinechin for the VHDL code of the logarithm function [76]. M Moore posed interesting questions that helped us sharpen the discussion in section 4.3.

Palabras clave:Replica symmetry-breaking; Monte-Carlo simulations; Droplet picture; Model; Equilibrium; Systems; Dimensions; Computer; Dynamics; Overlaps.
Materias:Ciencias > Física
Ciencias > Física > Física-Modelos matemáticos
Código ID:37829
Depositado:26 May 2016 09:54
Última Modificación:27 May 2016 07:51

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