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arXiv 1507.05067math.PRmath-phmath.MP
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正交平均场自旋玻璃的高温渐近性质

High Temperature Asymptotics of Orthogonal Mean-Field Spin Glasses

Bhaswar B. Bhattacharya, Subhabrata Sen

摘要:

本文用哈密顿量$H_N(σ) = σ^T J σ$计算了超立方体上自旋玻璃自由能的高温极限,其中耦合矩阵$J$是由一定的对称正交不变系综得到的.我们的推导涉及到这些模型的退火自由能的球面积分,并表示在耦合矩阵$J$的限制谱测度方面的自由能的限制。作为应用,我们导出了高温下随机正交模型(ROM)的极限自由能,证实了Marinari等人(1994)的非严格计算。我们的方法也适用于其他著名的模型的无序系统,包括SK和高斯Hopfield模型。

英文摘要:

We evaluate the high temperature limit of the free energy of spin glasses on the hypercube with Hamiltonian $H_N(σ) = σ^T J σ$, where the coupling matrix $J$ is drawn from certain symmetric orthogonally invariant ensembles. Our derivation relates the annealed free energy of these models to a spherical integral, and expresses the limit of the free energy in terms of the limiting spectral measure of the coupling matrix $J$. As an application, we derive the limiting free energy of the Random Orthogonal Model (ROM) at high temperatures, which confirms non-rigorous calculations of Marinari et al. (1994). Our methods also apply to other well-known models of disordered systems, including the SK and Gaussian Hopfield models.

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