An optimized infinite time-evolving block decimation algorithm for lattice systems  

作　　者：许军军 Junjun Xu(Institute of Theoretical Physics,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]Institute of Theoretical Physics,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Chinese Physics B》2023年第4期171-174,共4页中国物理B（英文版）

基　　金：Project supported by Fundamental Research Funds for the Central Universities(Grant No.FRF-TP-19-013A3)。

摘　　要：The infinite time-evolving block decimation algorithm(i TEBD)provides an efficient way to determine the ground state and dynamics of the quantum lattice systems in the thermodynamic limit.In this paper we suggest an optimized way to take the i TEBD calculation,which takes advantage of additional reduced decompositions to speed up the calculation.The numerical calculations show that for a comparable computation time our method provides more accurate results than the traditional i TEBD,especially for lattice systems with large on-site degrees of freedom.

关 键 词：time-evolving block decimation matrix product states spin models symmetry-protected topological states 

分 类 号：O411[理学—理论物理]