Single-photon scattering in giant-atom topological-waveguide-QED systems
- URL: http://arxiv.org/abs/2408.14178v1
- Date: Mon, 26 Aug 2024 10:57:23 GMT
- Title: Single-photon scattering in giant-atom topological-waveguide-QED systems
- Authors: Hai Zhu, Xian-Li Yin, Jie-Qiao Liao,
- Abstract summary: We study single-photon scattering in a Su-Schrieffer-Heeger (SSH) waveguide coupled to either one or two two-level giant atoms.
We find that a single photon in the SSH waveguide can be completely reflected or transmitted by choosing proper coupling configurations.
This work will inspire the development of controllable single-photon devices based on the giant-atom topological-waveguide-QED systems.
- Score: 1.2479554210753663
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The giant-atom topological-waveguide-QED systems have recently emerged as a promising platform for manipulating light-matter interactions. The combination of the multiple-point couplings and topological phase effect could lead to rich physical phenomena and effects. Here, we study single-photon scattering in a Su-Schrieffer-Heeger (SSH) waveguide coupled to either one or two two-level giant atoms. We assume that each giant atom is coupled to the waveguide via two coupling points, and hence there exist four and sixteen coupling configurations for the single-giant-atom case and two-giant-atom separate coupling case, respectively. By solving the single-photon scattering problem in the real space, we obtain the exact expressions of the single-photon scattering amplitudes. It is found that a single photon in the SSH waveguide can be completely reflected or transmitted by choosing proper coupling configurations, coupling-point distances, atomic resonance frequency, and dimerization parameter. In addition, under proper parameter conditions, the scattering spectra are periodically modulated by the coupling-point distances. We also find that the collective behavior of the two giant atoms can be adjusted by quantum interference effect and topological effect, and that the single-photon scattering spectra can exhibit the Lorentzian, super-Gaussian, electromagnetically induced transparency-like, and asymmetric Fano line shapes for some coupling configurations. This work will inspire the development of controllable single-photon devices based on the giant-atom topological-waveguide-QED systems.
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