量子电子学报2025，Vol.42Issue(2)：217-228,12.DOI:10.3969/j.issn.1007-5461.2025.02.007
光波导中的一维拓扑无硬币态量子行走
One-dimensional topological coinless quantum walks in optical waveguides
摘要
Abstract
The one-dimensional coinless discrete-time quantum walk is realized in optical waveguides by utilizing directional couplers between waveguides in this work,then the topological diagram of this system is obtained and the corresponding dynamic evolution behavior affected by topological edge states is studied.The results show that when the number of the lattice sites is even,there are three different topological phases,corresponding to the topological edge states with zero-energy,π-energy,zero-energy and π-energy coexistence,respectively.Whereas,when the number of the lattice sites is odd,there are only two different topological phases,corresponding to the topological edge states with zero-energy,zero-energy and π-energy coexistence,respectively.By choosing the appropriate parameter and initial state,the walkers,i.e.particles,can only be localized at the boundary of the system or oscillate on the two lattice sites of the boundary.The localization behavior of the walkers during the walking process provides a feasible scheme to realize nondestructive quantum state transmission and quantum information transmission.关键词
量子光学/光波导/无硬币态离散时间量子行走/拓扑相图/拓扑边界态/动力学演化Key words
quantum optics/optical waveguide/coinless discrete-time quantum walks/topological phase diagram/topological edge states/dynamic evolution分类
物理学引用本文复制引用
蒙雅..光波导中的一维拓扑无硬币态量子行走[J].量子电子学报,2025,42(2):217-228,12.基金项目
山西省基础研究计划资助项目(202203021212180) （202203021212180）
