激光与光电子学进展, 2017, 54 (12): 122701, 网络出版: 2017-12-11  

Demkov-Kunike模型的高保真度超绝热量子驱动

High-Fidelity Superadiabatic Quantum Driving in Demkov-Kunike Model
作者单位
西北师范大学物理与电子工程学院甘肃省原子分子物理与功能材料重点实验室, 甘肃 兰州 730070
摘要
高保真度量子态的制备是量子精确操控的基本要求。利用超绝热技术,通过引入一个附加场强度参数,研究了Demkov-Kunike模型的高保真度超绝热量子驱动问题,讨论了附加场强度参数、啁啾参数、耦合强度以及静态失谐参数对Demkov-Kunike模型绝热过程的影响。研究结果表明,系统的保真度与附加场强度参数密切相关。当附加场强度参数为适当值时,无论对于无静态失谐情况还是存在静态失谐情况都有很好的参数稳健性,在所有的参数范围内能够抑制跃迁概率的振荡,实现高保真度、快速以及超绝热量子驱动。
Abstract
The preparation of high-fidelity quantum state is a basic requirement for precise control of quantum system. In this paper, by using superadiabatic technology and introducing an auxiliary field strength parameter, we investigate the problem of high-fidelity superadiabatic quantum driving in the Demkov-Kunike model, and discuss the influence of the auxiliary field strength parameters, chirp parameters, coupling strength and static detuning parameters on the adiabatic process of the Demkov-Kunike model. The results show that the fidelity of the system is closely related to the auxiliary field strength parameters. When the appropriate auxiliary field parameters are selected, the system has good parametric robustness, no matter the system is at no static detuning case or static detuning case. The oscillation of transition probability can be suppressed in all parameter ranges. The system can achieve high-fidelity, fast, and superadiabatic quantum driving.

冯平, 孙建安, 王文元, 豆福全. Demkov-Kunike模型的高保真度超绝热量子驱动[J]. 激光与光电子学进展, 2017, 54(12): 122701. Feng Ping, Sun Jian′an, Wang Wenyuan, Dou Fuquan. High-Fidelity Superadiabatic Quantum Driving in Demkov-Kunike Model[J]. Laser & Optoelectronics Progress, 2017, 54(12): 122701.

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