Universality in chaotic quantum transport: the concordance between random-matrix and semiclassical theories.

Universality in chaotic quantum transport: the concordance between random-matrix and semiclassical theories.
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混沌量子传输的普遍性:随机矩阵与半经典理论之间的一致性

DOI:
10.1103/physreve.85.045201
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发表时间:
2012
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
J. Kuipers
J. Kuipers
中科院分区:
--
文献类型:
--
作者:
G. Berkolaiko;J. Kuipers

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与随机矩阵理论一致,混沌量子点的电子传输表现出普遍的、与系统无关的性质。通过半经典近似,量子输运也可以在经典散射轨迹上求和为根。这些轨迹之间的相互关系可以用图表来组织,并已被证明为某些可观测到的问题提供了普遍的答案。在这里,我们通过与排列的因式分解的联系,发展了半经典图的一般组合处理。我们证明了传输本征值的矩的半经典方法和随机矩阵方法之间的一致性。这一结果对所有三个主要对称类(有或没有时间反转对称性和自旋-轨道相互作用)的倒道数展开的所有阶矩都是有效的,并推广到非线性统计。这最终解释了随机矩阵理论在混沌量子传输中的适用性,并提供了对传输本征值的概率密度的半经典访问。
Electronic transport through chaotic quantum dots exhibits universal, system-independent properties, consistent with random-matrix theory. The quantum transport can also be rooted, via the semiclassical approximation, in sums over the classical scattering trajectories. Correlations between such trajectories can be organized diagrammatically and have been shown to yield universal answers for some observables. Here, we develop the general combinatorial treatment of the semiclassical diagrams, through a connection to factorizations of permutations. We show agreement between the semiclassical and random matrix approaches to the moments of the transmission eigenvalues. The result is valid for all moments to all orders of the expansion in inverse channel number for all three main symmetry classes (with and without time-reversal symmetry and spin-orbit interaction) and extends to nonlinear statistics. This finally explains the applicability of random-matrix theory to chaotic quantum transport in terms of the underlying dynamics as well as providing semiclassical access to the probability density of the transmission eigenvalues.
量子输运校正和光谱统计的埃伦菲斯特时间依赖性。
DOI: 10.1103/physreve.82.066205
发表时间: 2010
期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子: --
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作者:
Livan, Giacomo;Vivo, Pierpaolo
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