模拟电荷噪声对自旋间交换相互作用的影响
Modelling the effect of charge noise on the exchange interaction between spins
摘要：
我们描述了如何通过交换相互作用耦合的一对自旋上的电荷噪声的影响可以通过建模电荷波动作为一个随机电报噪声过程中使用概率密度函数计算。我们推导了一对自旋的含时超算符随涨落幅度和速率变化的解析表达式。我们表明，该理论可以扩展到包括多个波动，特别是波动的谱分布。这些超算符可以包含在为自旋电子学或量子信息处理而设计的自旋系统状态的时间相关分析中，以确定交换波动的散肩效应。
英文摘要：
We describe how the effect of charge noise on a pair of spins coupled via the exchange interaction can be calculated by modelling charge fluctuations as a random telegraph noise process using probability density functions. We develop analytic expressions for the time dependent superoperator of a pair of spins as a function of fluctuation amplitude and rate. We show that the theory can be extended to include multiple fluctuators, in particular, spectral distributions of fluctuators. These superoperators can be included in time dependent analyses of the state of spin systems designed for spintronics or quantum information processing to determine the decohering effects of exchange fluctuations.
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