论文标题
具有基质产品状态方法的开放量子系统中两次相关函数的数值评估：一种比较
Numerical evaluation of two-time correlation functions in open quantum systems with matrix product state methods: a comparison
论文作者
论文摘要
我们比较了基于不同矩阵产品状态（MP）方法的效率，以计算开放量子系统中两次相关函数。该方法是使用MPS技术对随机量子轨迹的蒙特卡洛波函数（MCWF）采样的两种方法[1]和两种方法[2,3]。我们认为XXZ旋转链要么暴露于发出噪声或耗散性的局部自旋翻转。我们发现，在数值效率方面，对其中一种方法的偏好在很大程度上取决于耗散的特定形式。
We compare the efficiency of different matrix product state (MPS) based methods for the calculation of two-time correlation functions in open quantum systems. The methods are the purification approach [1] and two approaches [2,3] based on the Monte-Carlo wave function (MCWF) sampling of stochastic quantum trajectories using MPS techniques. We consider a XXZ spin chain either exposed to dephasing noise or to a dissipative local spin flip. We find that the preference for one of the approaches in terms of numerical efficiency depends strongly on the specific form of dissipation.
