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Dynamical properties and applications of discrete time nonunitary quantum walks

文献类型：期刊论文

作者Xu, Lihao1,2; Li, Meng1,2; Sun, Xiaoming1,2
刊名PHYSICAL REVIEW A
出版日期2025-12-09
卷号112期号:6页码:25
ISSN号2469-9926
DOI10.1103/mh45-qlty
英文摘要Most existing studies of quantum walk focus on unitary closed systems, while the nonunitary counterpart, relevant to open quantum systems, remains relatively unexplored. This paper analyzes the position distribution and variance of quantum walk under the specific nonunitary evolution operator. Our results reveal that the variance exhibits distinct dynamical behavior depending on angular parameters, spatial dimensions, and initial states. In particular, for the one-dimensional non-Hermitian two-band lattice model, we demonstrate that the variance grows quadratically with time steps in the short-time regime, indicating faster diffusion than classical random walk. Leveraging this acceleration, we further propose a teleportation protocol based on nonunitary quantum walk, which eliminates the need for entangled state preparation and thereby reduces resource overhead while enhancing information transfer efficiency.
资助项目National Natural Science Foundation of China[92465202] ; National Natural Science Foundation of China[62301531] ; Beijing Natural Science Foundation[4252012]
WOS研究方向Optics ; Physics
语种英语
WOS记录号WOS:001641552500007
出版者AMER PHYSICAL SOC
源URL[http://119.78.100.204/handle/2XEOYT63/42957]  
专题中国科学院计算技术研究所
通讯作者Li, Meng
作者单位1.Chinese Acad Sci, Inst Comp Technol, State Key Lab Processors, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Comp Sci & Technol, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Lihao,Li, Meng,Sun, Xiaoming. Dynamical properties and applications of discrete time nonunitary quantum walks[J]. PHYSICAL REVIEW A,2025,112(6):25.
APA Xu, Lihao,Li, Meng,&Sun, Xiaoming.(2025).Dynamical properties and applications of discrete time nonunitary quantum walks.PHYSICAL REVIEW A,112(6),25.
MLA Xu, Lihao,et al."Dynamical properties and applications of discrete time nonunitary quantum walks".PHYSICAL REVIEW A 112.6(2025):25.

入库方式： OAI收割

来源：计算技术研究所

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