Chaotic temperature and bond dependence of four-dimensional Gaussian spin glasses with partial thermal boundary conditions

Abstract

Spin glasses have competing interactions and complex energy landscapes that are highlysusceptible to perturbations, such as the temperature or the bonds. The thermal boundary condition technique is an effective and visual approach for characterizing chaos, and has been successfully applied to three dimensions. In this paper, we tailor the technique to partial thermal boundary conditions, where thermal boundary condition is applied in a subset (3 out of 4 in this work) of the dimensions for better flexibility and efficiency for a broad range of disordered systems. We use this method to study both temperature chaos and bond chaos of the four-dimensional Edwards-Anderson model with Gaussian disorder to low temperatures. We compare the two forms of chaos, with chaos of three dimensions, and also the four-dimensional ±J model. We observe that the two forms of chaos are characterized by the same set of scaling exponents, bond chaos is much stronger than temperature chaos, and the exponents are also compatible with the ±J model. Finally, we discuss the effects of chaos on the number of pure states in the thermal boundary condition ensemble. arXiv:1808.00886v3 [cond-mat.dis-nn]

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