Coherent dynamics in stochastic systems revealed by full counting statistics
Coherent dynamics in stochastic systems revealed by full counting statistics
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DOI：
10.1103/physrevb.98.035409
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发表时间：
2018-03
影响因子：
3.7
通讯作者：
P. Stegmann;J. Konig;S. Weiss
中科院分区：
文献类型：
--
作者：
P. Stegmann;J. Konig;S. Weiss
一般来说，随机系统具有确定性动力学和不同状态之间的概率转换。我们提出了一种方法来确定的完全计数统计的过渡的确定性的一部分。该建议说明了通过量子点自旋阀，它结合了量子相干自旋进动与电子隧穿的电子转移。我们表明，通过计算作为时间的函数的转移电子的数量，它是可能的，即使在运输制度，其中其他工具，如依赖于频率的电流噪声和等待时间分布的计数统计提取出的相干动力学失败。
Stochastic systems feature, in general, both deterministic dynamics and probabilistic transitions between different states. We propose a method to identify the deterministic part in the full counting statistics for the transitions. The proposal is illustrated for electron transfer through a quantum-dot spin valve, which combines quantum-coherent spin precession with electron tunneling. We show that by counting the number of transferred electrons as a function of time, it is possible to distill out the coherent dynamics from the counting statistics even in transport regimes, in which other tools such as the frequency-dependent current noise and the waiting-time distribution fail.