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arXiv 1905.08528cond-mat.dis-nn
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TAP方程的可实现解

The realizable solutions of the TAP equations

T. Aspelmeier, M. A. Moore

摘要:

我们证明,当自旋数$N$较大时,迭代法能找到的伊辛自旋玻璃Sherrington-Kirkpatrick模型TAP方程的解,只有那些自由能位于副本对称态和破副本对称态之间的解.收敛到这个相同的边界线也发生在从高温初始状态到局部稳定状态的淬火中,其中每个自旋平行于其局部场;两者都是自组织临界性的例子。在这个边界上,与解相关联的海森函数的本征值带扩展到零,因此所达到的状态具有边缘稳定性。我们还研究了确定对应于鞍点的固定解与其相关的最小值之间的自由能差的因素,该最小值是必须克服以逃离TAP最小值或纯态附近的障碍。

英文摘要:

We show that the only solutions of the TAP equations for the Sherrington-Kirkpatrick model of Ising spin glasses which can be found by iteration are those whose free energy lies on the border between replica symmetric and broken replica symmetric states, when the number of spins $N$ is large. Convergence to this same borderline also happens in quenches from a high temperature initial state to a locally stable state where each spin is parallel to its local field; both are examples of self-organized criticality. At this borderline the band of eigenvalues of the Hessian associated with a solution extends to zero, so the states reached have marginal stability. We have also investigated the factors which determine the free energy difference between a stationary solution corresponding to a saddle point and its associated minimum, which is the barrier which has to be surmounted to escape from the vicinity of a TAP minimum or pure state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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