Feedback preparation of Bell states for two-qubit systems with time delay

被引：6
作者：
Liu, Yanan [1 ,2 ]
Dong, Daoyi [1 ]
Petersen, Ian R. [3 ]
Kuang, Sen [4 ]
Yonezawa, Hidehiro [1 ,2 ]
机构：
[1] Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia
[2] Australian Res Council, Ctr Quantum Computat & Commun Technol, Canberra, ACT 2600, Australia
[3] Australian Natl Univ, Res Sch Engn, Canberra, ACT 2601, Australia
[4] Univ Sci & Technol China, Dept Automat, Hefei 230027, Peoples R China
来源：
2019 AMERICAN CONTROL CONFERENCE (ACC) | 2019年
基金：
中国国家自然科学基金;
关键词：
QUANTUM STATE; CONTROL DESIGN; ENTANGLEMENT;
D O I：
10.23919/acc.2019.8814881
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Bell states are the maximally entangled states in two-qubit quantum systems, and play a significant role in quantum computation and quantum communication. Feedback control of stochastic quantum systems usually suffers from time-delay problems caused by the computation time for filter states and the control input. This paper addresses the preparation of Bell states in two-qubit systems with a constant delay time. A Lyapunov method is used to design a switching control law and a constant is introduced to compensate for the computation time of the estimated states and the feedback control input, thereby stabilizing the target Bell state globally. Numerical results show the effectiveness of the proposed control law.
引用
收藏
页码：5008 / 5013
页数：6
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