论文标题
记忆效应保留了传输电流噪声频谱的时间本地方法
Memory effect preserved time-local approach to noise spectrum of transport current
论文作者
论文摘要
在二阶非马克维亚主方程描述中，我们开发了一种有效的方法，用于通过相互作用的介质系统计算传输电流的噪声光谱。通过引入适当的电流相关密度运算符，我们提出了一种实用且非常有效的时间本地方法来计算噪声光谱，包括不对称频谱，其中包含能量发射和吸收的完整信息。我们获得了当前噪声光谱的分析公式，以表征包括电子库仑相互作用和记忆效应在内的非平衡传输。我们证明了通过相互作用的量子点系统传输的提出的方法，并与广泛参数范围的确切结果找到了良好的一致性。
Within the second-order non-Markovian master equation description, we develop an efficient method for calculating the noise spectrum of transport current through interacting mesoscopic systems. By introducing proper current-related density operators, we propose a practical and very efficient time-local approach to compute the noise spectrum, including the asymmetric spectrum, which contains the full information of energy emission and absorption. We obtain an analytical formula of the current noise spectrum to characterize the nonequilibrium transport including electron-electron Coulomb interaction and the memory effect. We demonstrate the proposed method in transport through interacting-quantum-dots system, and find good agreement with the exact results under broad range of parameters.
