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摘要

本文先构建一束弱探测场和一束强控制场所形成的V型三能级金刚石氮空位（NV）色心电磁诱导透明（EIT）模型, 随后研究探测场在体系的线性吸收和非线性传播特性. 结果表明, 一旦开启强控制场, 体系就会呈现出EIT窗口, 且透明窗口的宽度随着控制场磁感应强度的增加而变宽. 在非线性情况下, 探测场能形成稳定传播的孤子, 且可通过开启和关闭控制场的磁场实现孤子的存储和读取, 可以有效地克服冷原子介质和量子点介质孤子存取的缺陷. 值得一提的是, 体系所存取孤子的振幅还可以通过控制场的磁感应强度来进行调节.

关键词:

Abstract

Compared with light, the solitons, which are from the balance between dispersion and nonlinearity of the system, possess high stability and fidelity as the information carries in quantum information processing and transmission, and have gained considerable attention in ultra-cold atomic electromagnetically induced transparent (EIT) media. To date, the EIT models on the three-level ultra-cold atoms realized experimentally, are ladder-, $\Lambda $ -, and V-type mode. Current studies show that the solitons cannot be stored in V-type three-level ultra-cold atomic EIT media but they can be stored in ladder- and $\Lambda $ -type three-level ultra-cold atomic EIT media. It is mainly because the atoms of the V-type system initially are in a excited state, while the atoms of the ladder- and $\Lambda $ -type systems initially are in the ground state. For the practical applications, it is a large challenge to control accurately the solitons stored in the ultra-cold atomic EIT media due to their ultralow temperature and rarefaction. Fortunately, with the maturity of semiconductor quantum technology, quantum dots have extensively application prospect in quantum information processing and transmission. However, the solitons cannot be stored in V-type three level InAs/GaAs quantum dot EIT media either, while it can be stored in ladder-type system and $\Lambda $ -type system. Therefore, herein we propose a V-type three-level nitrogen-vacancy (NV) center EIT model in which a weakprobe field and a strong control field are coupled to different energy levels of NV center in diamond. Subsequently, the linear and nonlinear properties of system are studied by using semiclassical theory combined with multi-scale method. It is shown that when control field is turned on, the linear absorption curve of the system presents an EIT window. And the width of the EIT window increases with the strength of magnetic induction of the control field increasing. In the nonlinear case, the solitons formed can stably propagate over a long distance. Interestingly, the solitons can be stored and retrieved by switching off and on the magnetic field of control field. Moreover, the amplitude of the stored solitons can be modulated by the magnetic induction strength of control field. This result indicates that solitons as information carriers in quantum information processing and transmission of NV center can greatly improve the fidelity of information processing.

Keywords:

nitrogen vacancy in diamond/
storage and retrieval of solitons/
electromagnetically induced transparency

作者及机构信息

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通信作者:王登龙,dlwang@xtu.edu.cn

基金项目:国家自然科学基金 (批准号: 11832016)资助的课题.

Authors and contacts

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Corresponding author:Wang Deng-Long,dlwang@xtu.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant No. 11832016).

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施引文献

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下载: 全尺寸图片幻灯片

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