Dynamic linear response of the SK spin glass coupled microscopically to a bath

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dc.creatorPlefka, T.
dc.date2002-06-06
dc.date2002-08-26
dc.date.accessioned2026-07-07T02:45:46Z
dc.date.available2026-07-07T02:45:46Z
dc.descriptionThe dynamic linear response theory of a general Ising model weakly coupled to a heat bath is derived employing the quantum statistical theory of Mori, treating the Hamiltonian of the spin bath coupling as a perturbation, and applying the Markovian approximation. Both the dynamic susceptibility and the relaxation function are expressed in terms of the static susceptibility and the static internal field distribution function. For the special case of the SK spin glass this internal field distribution can be related to the solutions of the TAP equations in the entire temperature region. Application of this new relation and the use of numerical solutions of the modified TAP equations leads for finite but large systems to explicit results for the distribution function and for dynamic linear response functions. A detailed discussion is presented which includes finite size effects. Due to the derived temperature dependence of the Onsager-Casimir coefficients a frequency-dependent shift of the cusp temperature of the real part of the dynamic susceptibility is found.
dc.description15 pages, 4 figures, submitted to J.Phys.A: Math. Gen
dc.identifierhttps://arxiv.org/abs/cond-mat/0206090
dc.identifierhttp://arxiv.org/abs/cond-mat/0206090
dc.identifierJ.Phys.A: Math. Gen. 35 (2002) 8691
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19417
dc.subjectDisordered Systems and Neural Networks
dc.subjectStatistical Mechanics
dc.titleDynamic linear response of the SK spin glass coupled microscopically to a bath
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