Random matrix theory of a chaotic Andreev quantum dot.
Random matrix theory of a chaotic Andreev quantum dot.
复制标题
混沌 Andreev 量子点的随机矩阵理论。
DOI：
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发表时间：
1995
影响因子：
8.6
通讯作者：
M. Zirnbauer
中科院分区：
文献类型：
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作者：
A. Altland;M. Zirnbauer
确定了一个不同于标准Wigner-Dyson类的新的普适性类。该类是通过将金属量子点与超导体接触，同时施加磁场，使配对场平均有效消失来实现的。提出了这种量子点的光谱和输运特性的随机矩阵描述。隧道电导的弱局域化校正是非零的，这是由于与超导体的耦合导致态密度耗竭造成的。半经典地说，损耗是由粒子和空穴的相相干长程传播的奇异模式引起的。{版权所有}{ital 1996美国物理学会。}
A new universality class distinct from the standard Wigner-Dyson class is identified. This class is realized by putting a metallic quantum dot in contact with a superconductor, while applying a magnetic field so as to make the pairing field effectively vanish on average. A random-matrix description of the spectral and transport properties of such a quantum dot is proposed. The weak-localization correction to the tunnel conductance is nonzero and results from the depletion of the density of states due to the coupling with the superconductor. Semiclassically, the depletion is caused by a singular mode of phase-coherent long-range propagation of particles and holes. {copyright} {ital 1996 The American Physical Society.}