Dynamical properties and applications of discrete time nonunitary quantum walks

doi:10.1103/mh45-qlty

CSpace

	Dynamical properties and applications of discrete time nonunitary quantum walks
	Xu, Lihao 1,2; Li, Meng 1,2; Sun, Xiaoming 1,2
	2025-12-09
发表期刊	PHYSICAL REVIEW A
ISSN	2469-9926
卷号	112 期号:6 页码:25
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.
DOI	10.1103/mh45-qlty
收录类别	SCI
语种	英语
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:001641552500007
出版者	AMER PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42958
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.