Diffusion Properties of Non-Periodic Quantum Walks

被引：0
|
作者：
Ren Jianfeng [1 ]
Zhang Rong [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Jiangsu, Peoples R China
来源：
LASER & OPTOELECTRONICS PROGRESS | 2020年 / 57卷 / 23期
关键词：
quantum optics; quantum walks; wave function; coherent superposition; unitary evolution; diffusion; ENTANGLEMENT;
D O I：
10.3788/LOP57.232701
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The diffusion property of wave functions in the non-periodic quantum walks is investigated in detail. The numerical results show that the multipath coherent superposition state can be precisely controlled by using position dependent unitary evolution. Different evolutionary operations lead to the phenomenon of constructive or destructive interference and thus it affects the diffusion property. The diffusion speed of the walker can be changed by adjusting the evolution parameters of the system. The research on the diffusion speed of quantum walks is helpful to design new algorithms based on quantum walks.
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页数：5
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