FeynDyn: A MATLAB program for fast numerical Feynman integral calculations for open quantum system dynamics on GPUs

Abstract
This MATLAB program calculates the dynamics of the reduced density matrix of an open quantum system modeled either by the Feynman–Vernon model or the Caldeira–Leggett model. The user gives the program a Hamiltonian matrix that describes the open quantum system as if it were in isolation, a matrix of the same size that describes how that system couples to its environment, and a spectral distribution function and temperature describing the environment’s influence on it, in addition to the open ...

Title of program: FeynDyn
Catalogue Id: AEPX_v1_0

Nature of problem
Calculating the dynamics of the reduced density operator of an open quantum system.

Versions of this program held in the CPC repository in Mendeley Data
AEPX_v1_0; FeynDyn; 10.1016/j.cpc.2013.07.001

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

### 摘要
本MATLAB程序可针对以费曼-弗农模型（Feynman–Vernon model）或卡尔德拉-莱格特模型（Caldeira–Leggett model）建模的开放量子系统，计算其约化密度矩阵的动力学演化。用户需向程序输入描述孤立态开放量子系统的哈密顿矩阵、与该系统维度一致且描述系统与环境耦合方式的耦合矩阵，以及用于刻画环境对系统影响的谱分布函数与温度参数，此外还需提供开放……

程序标题：FeynDyn
目录编号：AEPX_v1_0

### 问题本质
计算开放量子系统的约化密度算符动力学演化。

该程序收录于曼德莱数据（Mendeley Data）中的《计算机物理通讯》（Computer Physics Communications）程序库，版本信息为：AEPX_v1_0; FeynDyn; 10.1016/j.cpc.2013.07.001

本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2019）