arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1309.0076cond-mat.stat-mechcond-mat.dis-nn
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自旋玻璃系统中配分函数的零点与动力学奇异性

Zeros of the partition function and dynamical singularities in spin-glass systems

Kazutaka Takahashi, Tomoyuki Obuchi

摘要:

我们研究了自旋玻璃系统,其特征在于连续出现的奇异性。利用Lee-Yang零点理论寻找奇点。利用平均场系统中的副本方法,我们证明了配分函数零点在复参数平面上的二维分布是随机系统的特征。几种模型的计算结果表明,自旋玻璃态的混沌概念不同于复本对称性破缺。我们讨论了在虚温度下的混沌相不同于自旋玻璃相,并且可以通过量子动力学在猝灭协议中访问。

英文摘要:

We study spin-glass systems characterized by continuous occurrence of singularities. The theory of Lee-Yang zeros is used to find the singularities. By using the replica method in mean-field systems, we show that two-dimensional distributions of zeros of the partition function in a complex parameter plane are characteristic feature of random systems. The results of several models indicate that the concept of chaos in the spin-glass state is different from that of the replica symmetry breaking. We discuss that a chaotic phase at imaginary temperature is different from the spin-glass phase and is accessible by quantum dynamics in a quenching protocol.

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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