arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0712.2658cond-mat.dis-nn
收藏

Bethe晶格上Ising自旋玻璃的动力学

Dynamics of an Ising Spin Glass on the Bethe Lattice

Martin Kiemes, Heinz Horner

摘要:

本文研究了Bethe晶格上Ising自旋玻璃的动态低温行为。从Glauber动力学出发,我们提出了一个像Ancestor这样的腔,它允许治疗动力学的缓慢(低温)部分。假设连续相变和长时间尺度上的超对称性,我们在临界温度附近用微扰的方法处理这个问题。该理论制定的相关响应函数的任意顺序。然而,它们可以完全分解为仅取决于两个时间参数的对函数的乘积。对于二元耦合$J=\pm I$的一个自旋玻璃的解决方案被发现,接近相应的解决方案的SK-模型在高连通性的限制。对于更一般的分布$P(J)$,似乎不存在这种类型的稳定或边际解。在这种更一般的情况下,低温相的性质尚不清楚。

英文摘要:

We study the dynamical low temperature behaviour of the Ising spin glass on the Bethe lattice. Starting from Glauber dynamics we propose a cavity like Ansatz that allows for the treatment of the slow (low temperature) part of dynamics. Assuming a continuous phase transitions and ultrametricity with respect to long time scales we approach the problem perturbatively near the critical temperature. The theory is formulated in terms of correlation-response-functions of arbitrary order. They can, however, be broken down completely to products of pair functions depending on two time arguments only. For binary couplings $J=\pm I$ a spin glass solution is found which approaches the corresponding solution for the SK-model in the limit of high connectivity. For more general distributions $P(J)$ no stable or marginal solution of this type appears to exist. The nature of the low temperature phase in this more general case is unclear.

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。

↑