量子点中量子输运的非马尔可夫散粒噪声谱
Non-Markovian shot noise spectrum of quantum transport through quantum dots
摘要：
具有输运粒子数分辨率的广义量子主方程与传统的无条件主方程一样，也具有时间定域性和时间非定域性，后者更适合于考虑电极带宽对弱系统-储层耦合量子输运和噪声谱的影响。进一步分析了库仑相互作用对量子点系统输运电流噪声谱的影响，指出只有在非马尔可夫处理下，才能体现实际的有限库仑相互作用和有限带宽.我们证明了散粒噪声谱的一些非马尔可夫特性，包括由于有限的带宽和库仑相互作用的幅度敏感和增强。
英文摘要：
The generalized quantum master equation with transport particle number resolution, like its conventional unconditioned counterpart, has also the time-local and time-nonlocal prescriptions.The latter is found to be more suitable for the effect of electrodes bandwidth on quantum transport and noise spectrum for weak system-reservoir coupling, as calibrated with the exact results in the absence of Coulomb interaction. We further analyze the effect of Coulomb interaction on the noise spectrum of transport current through quantum dot systems, and show that the realistic finite Coulomb interaction and finite bandwidth are manifested only with non-Markovian treatment. We demonstrate a number of non-Markovian characteristics of shot noise spectrum, including that due to finite bandwidth and that sensitive to and enhanced by the magnitude of Coulomb interaction.
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