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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…

Quantum Physics · Physics 2025-03-14 Hai Zhu , Xian-Li Yin , Jie-Qiao Liao

We investigate single-photon scattering in a waveguide-QED setup, where a giant molecule composed of two frequency-detuned giant atoms is coupled to two parallel waveguides via multiple connection points. The competition between coherent…

Quantum Physics · Physics 2026-05-07 Ze-Quan Zhang , Guang-Zheng Ye , Wei-Xin Chen , Yong Li , Huaizhi Wu

We study chiral and nonreciprocal single-photon scattering in a chiral-giant-molecule waveguide-QED system. Here, the giant molecule consists of two coupled giant atoms, which interact with two linear waveguides, forming a four-port quantum…

Quantum Physics · Physics 2023-06-21 Juan Zhou , Xian-Li Yin , Jie-Qiao Liao

In this paper, we investigate the single-photon scattering and bound states in a one-dimensional coupled-resonator waveguide which couples to a single artificial giant atom with two or more coupling points. When the atom couples to the…

Quantum Physics · Physics 2020-06-01 Wei Zhao , Zhihai Wang

We investigate the single-photon scattering spectra of a giant atom coupled to a one dimensional waveguide via multiple connection points or a continuous coupling region. Using a full quantum mechanical method, we obtain the general…

Quantum Physics · Physics 2022-01-14 Q. Y. Cai , W. Z. Jia

We investigate coherent single-photon transport in a waveguide-QED structure containing two giant atoms. The unified analytical expressions of the single-photon scattering amplitudes applicable for different topological configurations are…

Quantum Physics · Physics 2022-01-17 S. L. Feng , W. Z. Jia

We investigate coherent single-photon transport in a waveguide quantum electrodynamics structure containing multiple giant atoms. The single-photon scattering amplitudes are solved using a real-space method. The results give rise to a clear…

Quantum Physics · Physics 2024-03-05 Y. P. Peng , W. Z. Jia

We investigate the scattering processes of two photons in a one-dimensional waveguide coupled to two giant atoms. By adjusting the accumulated phase shifts between the coupling points, we are able to effectively manipulate the…

Quantum Physics · Physics 2024-03-01 Wenju Gu , Lei Chen , Zhen Yi , Sujing Liu , Gao-xiang Li

The nonlocal emitter-waveguide coupling, which gives birth to the so called giant atom, represents a new paradigm in the field of quantum optics and waveguide QED. In this paper, we investigate the single-photon scattering in a…

Quantum Physics · Physics 2021-12-08 Wei Zhao , Yan Zhang , Zhihai Wang

We investigate the single photon scattering in a phonon-photon hybrid system in the waveguide QED scheme. In our consideration, an artificial giant atom, which is dressed by the phonons in a surface acoustic wave resonator, interacts with a…

Quantum Physics · Physics 2023-07-19 Xinyu Li , Wei Zhao , Zhihai Wang

In this work, we utilize a two-level atom and a ${\Lambda}$-type atom to link two identical waveguides, subsequently extending the model to a giant-atom configuration. Our analytical solutions and numerical simulations demonstrate that this…

Recent experiments have pushed the studies on atom-photon interactions to the ultrastrong regime, which motivates the exploration of physics beyond the rotation wave approximation. Here we study the single-photon scattering on a system…

Quantum Physics · Physics 2017-07-18 Qi-Kai He , Wei Zhu , Z. H. Wang , D. L. Zhou

We study single-photon scattering spectra of a giant atom chirally coupled to a one-dimensional waveguide at multiple connection points, and examine chirality induced effects in the scattering spectra. We show that the transmission spectra…

Quantum Physics · Physics 2025-07-08 Shu-Yu Li , Ze-Quan Zhang , Lei Du , Yong Li , Huaizhi Wu

We investigate the coherent single photon scattering process in a topological waveguide coupled with a driven $\Lambda$ system. We derive an analytical expression for transmittance by using the scattering formalism for three different…

Quantum Physics · Physics 2025-08-15 Gunjan Yadav , Madan Mohan Mahana , Tarak Nath Dey

We investigate the single-photon scattering spectrum of a driven $\Lambda$-type giant atom system chirally coupled to a one-dimensional (1D) waveguide. By employing a real-space scattering approach, we obtain analytical solutions for the…

Quantum Physics · Physics 2025-08-25 Yimei Wang , Jing Li , Lan Zhou , Jing Lu

We give an exposure to diagrammatic techniques in waveguide QED systems. A particular emphasis is placed on the systems with delayed coherent quantum feedback. Specifically, we show that the $N$-photon scattering matrices in single-qubit…

Quantum Physics · Physics 2021-09-01 Kiryl Piasotski , Mikhail Pletyukhov

This work investigates single-photon scattering in a one-dimensional coupled-resonator waveguide coupled to a giant atom with a complex on-site energy. Within the generalized projection operator formalism, we derive analytical expressions…

Quantum Physics · Physics 2025-12-22 Yu Xin , Jia-Ming Zhang , Bing Chen

We study the two-photon scattering processes in a one-dimensional waveguide coupled to a two- or three-level giant atom, respectively. The accumulated phase shift between the two coupling points can be utilized to alter the scattering…

Quantum Physics · Physics 2023-11-30 Wenju Gu , He Huang , Zhen Yi , Lei Chen , Lihui Sun , Huatang Tan

We study controllable single photon scattering in a one-dimensional waveguide coupling with an additional cavity by second order nonlinear materials in a non-cascading configuration, where the additional cavity is embedded with two-level…

Optics · Physics 2020-07-15 Hongyu Lin , Xiaoqian Wang , Zhihai Yao , Dandan Zou

We study the single-photon scattering in a one-dimensional (1D) waveguide coupled to one transition of a $V$-type giant atom (GA), whose other transition is coherently driven by an classical field. The inelastic scattering of single photons…

Quantum Physics · Physics 2025-11-14 Hongzheng Wu , Ge Sun , Jing Lu , Lan Zhou
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