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arXiv quant-ph/0209165quant-ph
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随机矩阵的伪酉对称性与高斯伪酉系综

Pseudo-unitary symmetry and the Gaussian pseudo-unitary ensemble of random matrices

Zafar Ahmed, Sudhir R. Jain

摘要:

利用目前讨论的伪厄米性概念,我们定义了一个伪酉群。进一步,我们发展了一种在这样的群下不变的随机矩阵理论,并将这种伪厄米特随机矩阵的系综称为伪酉系综。我们得到了(2 × 2)PT对称哈密顿矩阵的最近邻能级间距分布的精确结果,它在零间距附近有一种新的形式slog(1/s).这显示出与维格纳表面的代数形式有显著区别的能级排斥。我们相信,这为描述二维统计力学、量子色动力学等领域的各种现象铺平了道路。

英文摘要:

Employing the currently discussed notion of pseudo-Hermiticity, we define a pseudo-unitary group. Further, we develop a random matrix theory which is invariant under such a group and call this ensemble of pseudo-Hermitian random matrices as the pseudo-unitary ensemble. We obtain exact results for the nearest-neighbour level spacing distribution for (2 X 2) PT-symmetric Hamiltonian matrices which has a novel form, s log (1/s) near zero spacing. This shows a level repulsion in marked distinction with an algebraic form in the Wigner surmise. We believe that this paves way for a description of varied phenomena in two-dimensional statistical mechanics, quantum chromodynamics, and so on.

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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