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arXiv 1010.2677math.PRcond-mat.dis-nn
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短程自旋玻璃和随机重叠结构

Short-range spin glasses and Random Overlap Structures

Louis-Pierre Arguin, Michael Damron

摘要:

研究了在周期边界条件下,由Edwards-Anderson(EA)自旋玻璃模型在$\Z^d$上构造的随机重叠结构(ROSt)的性质. ROSt是$\N\times\N$随机矩阵,其条目是从吉布斯测度采样的自旋构型的重叠。由于ROSt结构对于平均场模型(如谢灵顿-柯克帕特里克模型)和短程模型(如EA模型)是相同的,因此该设置是研究维度对吉布斯测度性质影响的良好共同基础。在这种精神下,它示出,使用平移不变性,的EA模型的ROSt具有局部稳定性,是强于随机稳定性,一个属性,在几乎所有的温度下,在许多自旋玻璃模型与高斯耦合。这一事实是用来证明随机稳定的EA自旋玻璃在所有温度和广泛的耦合分布。在此基础上,恢复和推广了Newman和Stein关于EA模型纯态分解的一个定理。

英文摘要:

Properties of Random Overlap Structures (ROSt)'s constructed from the Edwards-Anderson (EA) Spin Glass model on $\Z^d$ with periodic boundary conditions are studied. ROSt's are $\N\times\N$ random matrices whose entries are the overlaps of spin configurations sampled from the Gibbs measure. Since the ROSt construction is the same for mean-field models (like the Sherrington-Kirkpatrick model) as for short-range ones (like the EA model), the setup is a good common ground to study the effect of dimensionality on the properties of the Gibbs measure. In this spirit, it is shown, using translation invariance, that the ROSt of the EA model possesses a local stability that is stronger than stochastic stability, a property known to hold at almost all temperatures in many spin glass models with Gaussian couplings. This fact is used to prove stochastic stability for the EA spin glass at all temperatures and for a wide range of coupling distributions. On the way, a theorem of Newman and Stein about the pure state decomposition of the EA model is recovered and extended.

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