Single photon scattering from a chain of giant atoms coupled to a one-dimensional waveguide

Abstract

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 picture of the multi-channel scattering process. In the case of identical and equally-spaced giant atoms in a separate configuration, we also use the transfer-matrix method to express the scattering amplitudes in terms of compact analytical expressions, which allow us to conveniently analyze the properties of the scattering spectra. Based on these theoretical results, we find that the non-dipole effects of giant atoms, which are relevant to the design of the setup, can strongly manipulate several types of collective properties of the output fields, including the superradiant phenomenon, the multiple Fano interference, and the photonic band gap. This makes it possible to manipulate the photon transport in a more versatile way than with small atoms. We also make a proposal to probe the topological states of a chain of braided giant atoms by using photon scattering spectra, showing that waveguide quantum electrodynamics systems with giant atoms are ideal platforms to merge topological physics and on-chip quantum optics.

arXiv comment19 pages, 11 figures

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• Non-Markovian dynamics with a giant atom coupled to a semi-infinite photonic waveguide
• Single-photon scattering in giant-atom waveguide systems with chiral coupling
• Non-Markovian dynamics with a driven three-level giant atom in a semi-infinite photonic waveguide
• Tunable photon-photon correlations in waveguide QED systems with giant atoms
• Simulating and probing many-body quantum states in waveguide-QED systems with giant atoms
• Harnessing spontaneous emission of correlated photon pairs from ladder-type giant atoms
• Engineering photonic band gaps with a waveguide-QED structure containing an atom-polymer array
• Unidirectional exceptional point of reflectionless states in a magnonic mirror array
• Oscillating bound states in waveguide-QED system with two giant atoms
• Nonreciprocity enhanced Quantum Gyroscopes based on Surface Acoustic Waves