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arXiv 2602.18399cond-mat.dis-nn
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重叠锁定与非微扰效应在自旋玻璃中

Overlap locking and non-perturbative effects in spin glasses

Università del Salento(萨莱诺大学);INFN Sez. Lecce(意大利国家核物理研究所莱切分部);Université Paris-Saclay(巴黎-萨克雷大学);CNRS, LPTMS(法国国家科学研究中心理论与统计物理实验室);International Research Center of Complexity Sciences, Hangzhou International Innovation Institute, Beihang University(北京航空航天大学杭州国际创新学院复杂科学国际研究中心);Dipartimento di Fisica, Sapienza Università di Roma(罗马第一大学物理系);CNR–Nanotec, Rome Unit(意大利国家研究委员会纳米技术研究所罗马分部);INFN–Sezione di Roma 1(意大利国家核物理研究所罗马第一分部)

Silvio Franz, Giorgio Parisi, Federico Ricci-Tersenghi

AI总结:

本文通过平均场方法研究了自旋玻璃中重叠锁定现象及非微扰效应,分析了有限体积修正和相关性衰减的临界指数。

摘要:

我们研究了在低温下自旋玻璃中序参量(或同步)锁定现象。当两个具有独立 disorder 的系统耦合时,它们的重叠会变得相似。一个关键问题是这种效应如何依赖于两个系统之间耦合的强度。当 $1 \ll ΔH \ll N$ 时,即当 $ΔH$ 是耦合哈密顿量,$N$ 是系统大小时,会出现非微扰现象。在中间耦合区域,这种效应与有限体积自由能修正以及 Dyson 分层自旋玻璃中的相关性有关,后者模拟了有限维系统的物理。我们通过平均场方法,既分析又数值研究了这一现象,并最终计算了平均场理论中有限体积修正的临界指数以及 Dyson 分层模型中相关性衰减的指数。

英文摘要:

We study the phenomenon of the locking of the order parameter (or synchronization) in spin glasses at low temperatures. When two systems with independent disorders are coupled, their overlaps become similar. A crucial question is how this effect depends on the strength of the coupling between the two systems. Non-perturbative phenomena are present when $1 \ll ΔH \ll N$, being $ΔH$ the coupling Hamiltonian and $N$ the size of the system. In this intermediate-coupling region, the effect is related to finite-size free-energy corrections and to the correlations in the Dyson hierarchical spin glass, a model that mimics the physics of finite-dimensional systems. We study this phenomenon in the mean-field approach, both analytically and numerically, and we finally compute the critical exponents for finite-volume corrections in mean-field theory and for the decay of correlations in the Dyson hierarchical model.

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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