Designing Fano-Like Quantum Routing via Atomic Dipole-Dipole Interactions
Jin-Song Huang1,2**, Jia-Hao Zhang1, Yan Wang3, Zhong-Hui Xu1
1School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000 2Department of Physics, South China University of Technology, Guangzhou 510640 3School of Foreign Studies, Jiangxi University of Science and Technology, Ganzhou 341000
Abstract：Fano-like quantum routing of single photons in a system with two waveguides coupled to two collocated atoms is investigated theoretically. Using a full quantum theory in real space, photonic scattering amplitudes along four ports of the waveguide network are analytically obtained. It is shown that, by adjusting the atomic dipole-dipole interaction, an evident Fano-line shape emerges in the scattering spectra of the single-dot configuration system. Moreover, Fano resonance can also be achieved by varying the atom-waveguide coupling strength and atomic detuning, in the presence of the atomic dipole-dipole interaction. Therefore, the atomic dipole-dipole interaction may be utilized as a possible way to control spectral Fano-like resonance. The feasibility with the experimental waveguide channels is also discussed.
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2018, Vol. 35 
