arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.09217cond-mat.dis-nncond-mat.stat-mechmath-phmath.MP
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高维随机景观中的流形:驻点的复杂性与去钉扎

Manifolds in high dimensional random landscape: complexity of stationary points and depinning

Yan V Fyodorov, Pierre Le Doussal

摘要:

我们得到了退火复杂性的显式表达式,分别与(i)驻点总数和(ii)局部极小值的能量景观的内部尺寸$d<4$嵌入在一个随机介质的尺寸为$N \gg 1$和限制的抛物型潜力与曲率参数$μ$的弹性流形。这些复杂性都消失在确定为拉金质量的临界值$μ_c$。对于$μ<μ_c$,系统处于复相,对应于其$T=0$热力学中的复本对称性破缺缺。在$μ_c^-$上,复杂性分别以二次(稳定点)和三次(最小值)的方式消失。对于$d\geq 1$,它们允许有限的“无质量”极限$μ=0$,该极限用于提供施加力下的脱钉阈值的上限。

英文摘要:

We obtain explicit expressions for the annealed complexities associated respectively with the total number of (i) stationary points and (ii) local minima of the energy landscape for an elastic manifold with internal dimension $d<4$ embedded in a random medium of dimension $N \gg 1$ and confined by a parabolic potential with the curvature parameter $μ$. These complexities are found to both vanish at the critical value $μ_c$ identified as the Larkin mass. For $μ<μ_c$ the system is in complex phase corresponding to the replica symmetry breaking in its $T=0$ thermodynamics. The complexities vanish respectively quadratically (stationary points) and cubically (minima) at $μ_c^-$. For $d\geq 1$ they admit a finite "massless" limit $μ=0$ which is used to provide an upper bound for the depinning threshold under an applied force.

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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