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arXiv 1306.5157cond-mat.mes-hallnlin.CD
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混沌量子点电导涨落的反关联

Anti-correlation for Conductance Fluctuations in Chaotic Quantum Dots

A. L. R. Barbosa, M. S. Hussein, J. G. G. S. Ramos

摘要:

研究了在Wigner-Dyson系综交叉中具有有限隧道势垒的开放混沌量子点中介观电子输运的关联函数。使用一个分析存根形式主义,我们表明出现的耗尽/放大的电导波动作为隧道势垒的函数,电子能量或磁导场的参数变化。此外,即使对于纯Dyson系综,混沌量子点中电导涨落的关联函数也可以表现出反关联。实验支持我们的研究结果指出。

英文摘要:

We investigate the correlation functions of mesoscopic electronic transport in open chaotic quantum dots with finite tunnel barriers in the crossover between Wigner-Dyson ensembles. Using an analytical stub formalism, we show the emergence of a depletion/amplification of conductance fluctuations as a function of tunnel barriers, for both parametric variations of electron energy or magnetoconductance fields. Furthermore, even for pure Dyson ensembles, correlation functions of conductance fluctuations in chaotic quantum dots can exhibit anti-correlation. Experimental support to our findings is pointed out.

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