Adiabatic Terminator for Fermionic Hierarchical Equations of Motion  

费米型级联运动方程的绝热截断方案

作　　者：Daochi Zhang Xu Ding Hou-Dao Zhang Xiao Zheng YiJing Yan 张道弛;丁旭;张厚道;郑晓;严以京(中国科学技术大学量子信息与量子科技前沿协同创新中心,合肥230026;中国科学技术大学微尺度物质科学国家研究中心,合肥230026)

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale&Synergetic Innovation Center of Quantum Information and Quantum Physics&CAS Center for Excellence in Nanoscience,University of Science and Technology of China,Hefei 230026,China [2]Hefei National Laboratory for Physical Sciences at the Microscale&iChEM,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Journal of Chemical Physics》2021年第6期905-914,I0005,共11页化学物理学报（英文）

摘　　要：The hierarchical equation of motion method has become one of the most popular numerical methods for describing the dissipative dynamics of open quantum systems linearly coupled to environment.However,its applications to systems with strong electron correlation are largely restrained by the computational cost,which is mainly caused by the high truncation tier L required to accurately characterize the strong correlation effect.In this work,we develop an adiabatic terminator by decoupling the principal dissipation mode with the fastest dissipation rate from the slower ones.The adiabatic terminator leads to substantially enhanced convergence with respect to L as demonstrated by the numerical tests carried out on a single impurity Anderson model.Moreover,the adiabatic terminator alleviates the numerical instability problems in the long-time dissipative dynamics.

关 键 词：Open quantum systems Hierarchical equations of motion Quantum dissipative dynamics 

分 类 号：O643.1[理学—物理化学]