Real-time simulation of finite frequency noise from a single electron emitter
Real-time simulation of finite frequency noise from a single electron emitter
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来自单个电子发射器的有限频率噪声的实时模拟
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
T. Martin
中科院分区：
文献类型：
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作者：
T. Jonckheere;T. Stoll;J. Rech;T. Martin
我们研究了耦合到一维导体的量子点中单个电子的实时发射，使用离散紧束缚链上的精确对角化。我们证明，通过计算一个电子态的时间演化，我们可以简单地获取系统中所有相关的物理量。特别是，我们能够准确计算有限频率电流自相关噪声。我们使用的方法是通用且通用的，可以研究许多不同参数（例如点透明度或水平位置）的影响。我们的结果可以直接与现有实验进行比较，也可以作为未来计算的基础，包括使用时间相关密度矩阵重整化群和其他基于紧束缚模型的技术的电子相互作用。
We study the real-time emission of single electrons from a quantum dot coupled to a one dimensional conductor, using exact diagonalization on a discrete tight-binding chain. We show that from the calculation of the time-evolution of the one electron states, we have a simple access to all the relevant physical quantities in the system. In particular, we are able to compute accurately the finite frequency current autocorrelation noise. The method which we use is general and versatile, allowing to study the impact of many different parameters like the dot transparency or level position. Our results can be directly compared with existing experiments, and can also serve as a basis for future calculations including electronic interactions using the time dependent density-matrix renormalisation group and other techniques based on tight-binding models.