运用动态双洛伦兹库对激发态原子布局数的调控

doi:10.12263/DZXB.20200893

电子学报 ›› 2021, Vol. 49 ›› Issue (11): 2251-2255.DOI: 10.12263/DZXB.20200893

运用动态双洛伦兹库对激发态原子布局数的调控

张斯淇¹^,², 李宏¹^,², 李美萱¹^,², 刘小涵¹^,²

^1.吉林工程技术师范学院量子信息技术交叉学科研究院，吉林长春 130052
^2.吉林省量子信息技术工程实验室，吉林长春 130052

收稿日期:2020-08-15 修回日期:2021-03-06 出版日期:2021-11-25
- 作者简介:
- 张斯淇　女，1988年5月出生，吉林通化人.2017年毕业于吉林大学物理学院，其后工作于吉林工程技术师范学院.从事量子调控与光子晶体方面理论研究. E‑mail:siqizhang88@163.com
  李　宏　男，1989年2月出生，吉林公主岭人.2018年毕业于东北师范大学物理学院，其后工作于吉林工程技术师范学院.从事量子调控方面理论研究.
- 基金资助:
- 国家自然科学基金 (11947060); 吉林省教育厅科技规划 (JJKH20190764KJ); 吉林工程技术师范学院博士科研启动经费专项 (BSKJ201828)

Control of the Population of Excited Atom by Using the Dynamic Double Lorentzian Reservior

ZHANG Si-qi¹^,², LI Hong¹^,², LI Mei-xuan¹^,², LIU Xiao-han¹^,²

^1.Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Changchun, Jilin 130052, China
^2.Jilin Engineering Laboratory for Quantum Information Technology, Changchun, Jilin 130052, China

Received:2020-08-15 Revised:2021-03-06 Online:2021-11-25 Published:2021-11-25
- Supported by:
- National Natural Science Foundation of China (11947060); Science and Technology Planning of Department of Education of Jilin Province (JJKH20190764KJ); Doctoral Research Fund of Jilin Engineering Normal University (BSKJ201828)

摘要/Abstract

摘要：

随着量子信息领域的迅猛发展，通过实时调控量子系统的状态来控制量子态的相干与演化成为一个迫切需要解决的问题.本文研究动态双洛伦兹库对激发态原子布局数的调控，利用环境库的变化对原子系统相干性演化进行调制.讨论双洛伦兹库环境中心频率不同的动态调制形式对原子布局数演化的影响，选取双洛伦兹库环境中心频率的调制形式分别为：单次矩形脉冲、周期矩形脉冲、组合矩形脉冲和阶梯型矩形脉冲.双洛伦兹环境库的中心频率受到不同的动态环境库调制，系统的相干性演化在外力影响下得到了高效的保护和操纵，都能较好的实现可操控的量子态的相干性演化.这些为量子器件的研制提供重要的理论依据.

关键词: 量子调控, 自发辐射, 激发态原子

Abstract:

This paper uses the change of environment library to modulate the coherence evolution of atomic system. The influence of different dynamic modulation forms on the evolution of atomic population is discussed. The modulation forms of the environment center frequency of double Lorentzian reservior are selected as single rectangular pulse, periodic rectangular pulse, combined rectangular pulse and step rectangular pulse. The central frequency of the double Lorentzian environment reservior is modulated by different dynamic environment reserviors, and the coherent evolution of the system is effectively protected and manipulated under the influence of external forces, and the coherence evolution of the controllable quantum state can be better realized. These provide important theoretical basis for the development of quantum devices.

Key words: quantum control, spontaneous emission, excited atom

中图分类号:

O431.2

张斯淇, 李宏, 李美萱, 刘小涵. 运用动态双洛伦兹库对激发态原子布局数的调控[J]. 电子学报, 2021, 49(11): 2251-2255.

ZHANG Si-qi, LI Hong, LI Mei-xuan, LIU Xiao-han. Control of the Population of Excited Atom by Using the Dynamic Double Lorentzian Reservior[J]. Acta Electronica Sinica, 2021, 49(11): 2251-2255.

图/表 7

图1 静态无调制下双洛伦兹环境模型库原子布局数P的演化曲线(β为无量纲相对量，t为相对时间)，ω1=100β，ωc=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2

图2 双洛伦兹库的中心频率ωc(t)受单次矩形脉冲调制(不同时刻起点、同调制宽度)对原子布局数P演化的影响，ω1=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2

图3 双洛伦兹库的中心频率ωc(t)受单次矩形脉冲调制(同时刻起点、不同调制宽度)对原子布局数P演化的影响，ω1=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2

图4 双洛伦兹库的中心频率ωc(t)受周期矩形脉冲调制(同调制宽度、不同调制频率)对原子布局数P演化的影响，ω1=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2.(a)调制频率为6；(b)调制频率为5；(c)调制频率为4

图5 双洛伦兹库的中心频率ωc(t)受周期矩形脉冲调制(不同调制宽度、同调制频率)对原子布局数P演化的影响，ω1=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2.(a)调制宽度为2；(b)调制宽度为4；(c)调制宽度为6

图6 双洛伦兹库的中心频率ωc(t)受组合周期矩形脉冲调制对原子布局数P演化的影响，ω1=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2

图7 双洛伦兹库的中心频率ωc(t)受阶梯周期矩形脉冲调制对原子布局数P演化的影响，ω1=100β，γ1=1.5，γ2=2.5，W1=0.8，W2=0.2

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运用动态双洛伦兹库对激发态原子布局数的调控

Control of the Population of Excited Atom by Using the Dynamic Double Lorentzian Reservior

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