Controllable single-photon transport mediated by a time-modulated Jaynes–Cummings model

IF 1.5 4区 物理与天体物理 Q3 OPTICS
Haozhen Li, Yang Lan, Ran Zeng, Miao Hu, Mengmeng Xu, Xiuwen Xia, Jingping Xu, Yaping Yang
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引用次数: 0

Abstract

Controllable single-photon scattering in a one-dimensional waveguide coupled to a Jaynes–Cummings structure containing a time-modulated two-level atom interacting with a single-mode cavity is investigated. The photon transmission and reflection amplitudes are calculated by using an effective Floquet Hamiltonian in real space. The results show that the coupling between the atom and the cavity mode can dynamically be tuned via periodically modulating the atomic transition frequency. As a consequence, the scattering behaviors of the waveguide photons can be actively manipulated, and a controllable single-photon switch with high on-off ratio could be realized. More interestingly, the switch works well within a wide frequency region, i.e., the transmission of both resonant and off-resonant waveguide photons can be effectively switched on or off with appropriate system parameters. Furthermore, the proposed dynamically tunable switching scheme is robust against atomic dissipation associated with the help of atom-cavity coupling mismatch. Such single-photon device can be used as an elementary unit for various quantum information processing.
由时间调制杰尼斯-康明斯模型介导的可控单光子传输
研究了与杰尼斯-康明斯结构耦合的一维波导中的可控单光子散射,杰尼斯-康明斯结构包含一个与单模腔相互作用的时间调制双水平原子。光子的传输和反射振幅是通过实空间的有效 Floquet Hamiltonian 计算得出的。结果表明,原子与空腔模式之间的耦合可以通过周期性调制原子转变频率来动态调整。因此,可以主动操纵波导光子的散射行为,实现高开关比的可控单光子开关。更有趣的是,这种开关在很宽的频率区域内都能很好地工作,也就是说,在适当的系统参数下,共振和非共振波导光子的传输都能被有效地打开或关闭。此外,所提出的动态可调开关方案还能抵御原子-空腔耦合失配带来的原子耗散。这种单光子器件可用作各种量子信息处理的基本单元。
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来源期刊
CiteScore
3.60
自引率
6.20%
发文量
182
审稿时长
2.8 months
期刊介绍: Published twice-monthly (24 issues per year), Journal of Physics B: Atomic, Molecular and Optical Physics covers the study of atoms, ions, molecules and clusters, and their structure and interactions with particles, photons or fields. The journal also publishes articles dealing with those aspects of spectroscopy, quantum optics and non-linear optics, laser physics, astrophysics, plasma physics, chemical physics, optical cooling and trapping and other investigations where the objects of study are the elementary atomic, ionic or molecular properties of processes.
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