Quantum transport is studied for the nonequilibrium Anderson impurity model at zero temperature employing the multilayer multiconfiguration time-dependent Hartree theory within the second quantization representation (ML-MCTDH-SQR) of Fock space. To address both linear and nonlinear conductance in the Kondo regime, two new techniques of the ML-MCTDH-SQR simulation methodology are introduced: (i) the use of correlated initial states, which is achieved by imaginary time propagation of the overall Hamiltonian at zero voltage and (ii) the adoption of the logarithmic discretization of the electronic continuum. Employing the improved methodology, the signature of the Kondo effect is analyzed.

在Fock空间的第二个量化表示（ML-MCTDH-SQR）中，使用多层多配置时变Hartree理论研究了零温度下非平衡安德森杂质模型的量子输运。为了解决近藤状态下的线性和非线性电导，引入了ML-MCTDH-SQR模拟方法的两种新技术：（i）使用相关的初始状态，这是通过将整个哈密顿量在零时的虚假时间传播来实现的电压；（ii）采用电子连续体的对数离散化。使用改进的方法，分析了近藤效应的特征。