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

作　　者：黄劲松 黄红武 李艳玲 徐中辉 Jin-Song Huang;Hong-Wu Huang;Yan-Ling Li;Zhong-Hui Xu(School of Information Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Faculty of Science,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[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

出　　处：《Chinese Physics B》2024年第5期337-342,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12365003,12364024,and 11864014);the Jiangxi Provincial Natural Science Foundation(Grant Nos.20212BAB201014 and 20224BAB201023)。

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 

分 类 号：O431.2[机械工程—光学工程]