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arXiv 0901.2635cond-mat.stat-mechcond-mat.dis-nn
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随机顶点覆盖问题有限温度复制对称和第一步复制对称破缺腔解的稳定性分析

Stability analysis on the finite-temperature replica-symmetric and first-step replica-symmetry-broken cavity solutions of the random vertex cover problem

Pan Zhang, Ying Zeng, Haijun Zhou

摘要:

顶点覆盖问题是一个典型的组合优化难题。近年来,物理学家利用统计力学的腔方法对其进行了研究。本文通过种群动力学模拟,分析了有限顶点度随机正则图$K$上顶点覆盖问题的有限温度复制对称(RS)和第一步复制对称破缺(1 RSB)腔解的稳定性.我们发现:(1)RS解稳定的最低温度$T_{RS}(K)$不是$K$的单调函数;(2)在相对较大的连接度$K$和略低于动态转变温度$T_d(K)$的温度$T$下,具有较小但非负复杂度值的1 RSB解是稳定的。在随机Poissonian图上也得到了类似的结果。

英文摘要:

The vertex-cover problem is a prototypical hard combinatorial optimization problem. It was studied in recent years by physicists using the cavity method of statistical mechanics. In this paper, the stability of the finite-temperature replica-symmetric (RS) and the first-step replica-symmetry-broken (1RSB) cavity solutions of the vertex cover problem on random regular graphs of finite vertex-degree $K$ are analyzed by population dynamics simulations. We found that (1) the lowest temperature for the RS solution to be stable, $T_{RS}(K)$, is not a monotonic function of $K$, and (2) at relatively large connectivity $K$ and temperature $T$ slightly below the dynamic transition temperature $T_d(K)$, the 1RSB solutions with small but non-negative complexity values are stable. Similar results are obtained on random Poissonian graphs.

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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