基于紧束缚环模型的分数恢复现象研究  

Research on Fractional Revivals Based on a Tight-Binding Ring Model

作　　者：申庆徽[1] 刘维慧[1] 陈兵[1] 徐岩[1] 

机构地区：[1]山东科技大学理学院,山东青岛266510

出　　处：《山东科技大学学报（自然科学版）》2008年第6期88-91,共4页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：山东科技大学"春蕾计划"项目(2008AZZ093)

摘　　要：探讨了一维均匀紧束缚环模型中高斯波包的时间演化规律。应用解析及数值方法,研究了量子态在该系统中的演化过程,得出分数恢复现象的特征,即在某些时刻量子态表现为若干不同空间位置的子波包叠加,且这些子波包与初始波包具有相同的形状。此外,还从保真度的角度验证了分数恢复现象,并讨论了分数恢复现象在量子信息领域的应用。The paper investigates the time evolution form nearest-neighbor hopping integral. Analytical of a Gaussian wave packet in a tight binding ring model with uniinvestigations and numerical simulations show that fractional revivals of the quantum state occur in this system, i. e. , at appropriate times, a GWP can evolve into many copies of the initial states at different positions. The verification and application of this quantum phenomenon to quantum information transfer in solid-state systems are discussed.

关 键 词：紧束缚环 量子态 保真度 分数恢复 

分 类 号：O413[理学—理论物理]