Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system

doi:10.1088/1674-1056/ad2508

中国物理B ›› 2024, Vol. 33 ›› Issue (5): 50506-050506.doi: 10.1088/1674-1056/ad2508

Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system

Jin-Song Huang(黄劲松)^1,†, Hong-Wu Huang(黄红武)¹, Yan-Ling Li(李艳玲)¹, and Zhong-Hui Xu(徐中辉)²

1 School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2 Faculty of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China

收稿日期:2023-12-20 修回日期:2024-01-30 接受日期:2024-02-02 出版日期:2024-05-20 发布日期:2024-05-20
通讯作者: Jin-Song Huang E-mail:jshuangjs@126.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12365003, 12364024, and 11864014) and the Jiangxi Provincial Natural Science Foundation (Grant Nos. 20212BAB201014 and 20224BAB201023).

Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system

Jin-Song Huang(黄劲松)^1,†, Hong-Wu Huang(黄红武)¹, Yan-Ling Li(李艳玲)¹, and Zhong-Hui Xu(徐中辉)²

1 School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2 Faculty of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China

Received:2023-12-20 Revised:2024-01-30 Accepted:2024-02-02 Online:2024-05-20 Published:2024-05-20
Contact: Jin-Song Huang E-mail:jshuangjs@126.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12365003, 12364024, and 11864014) and the Jiangxi Provincial Natural Science Foundation (Grant Nos. 20212BAB201014 and 20224BAB201023).

摘要/Abstract

摘要： We theoretically investigate coherent scattering of single photons and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system. Using the real-space Hamiltonian, analytical expressions are derived for the transport spectra scattered by these two giant atoms with four azimuthal angles. Fano-like resonance can be exhibited in the scattering spectra by adjusting the azimuthal angle difference. High concurrence of the entangled state for two atoms can be implemented in a wide angle-difference range, and the entanglement of the atomic states can be switched on/off by modulating the additional azimuthal angle differences from the giant atoms. This suggests a novel handle to effectively control the single-photon scattering and quantum entanglement.

关键词: quantum transport, quantum entanglement, scattering theory, optical waveguide

Abstract: We theoretically investigate coherent scattering of single photons and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system. Using the real-space Hamiltonian, analytical expressions are derived for the transport spectra scattered by these two giant atoms with four azimuthal angles. Fano-like resonance can be exhibited in the scattering spectra by adjusting the azimuthal angle difference. High concurrence of the entangled state for two atoms can be implemented in a wide angle-difference range, and the entanglement of the atomic states can be switched on/off by modulating the additional azimuthal angle differences from the giant atoms. This suggests a novel handle to effectively control the single-photon scattering and quantum entanglement.

Key words: quantum transport, quantum entanglement, scattering theory, optical waveguide

中图分类号: (Quantum transport)

05.60.Gg

03.65.Ud (Entanglement and quantum nonlocality) 03.65.Nk (Scattering theory) 42.79.Gn (Optical waveguides and couplers)

Jin-Song Huang(黄劲松), Hong-Wu Huang(黄红武), Yan-Ling Li(李艳玲), and Zhong-Hui Xu(徐中辉). Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system[J]. 中国物理B, 2024, 33(5): 50506-050506.

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Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system

Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system

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