Realizing quantum optics in structured environments with giant atoms

Abstract

To go beyond quantum optics in free-space setups, atom-light interfaces with structured photonic environments are often employed to realize unconventional quantum electrodynamics (QED) phenomena. However, when employed as quantum buses, those long-distance nanostructures are limited by fabrication disorders. In this work, we alternatively propose to realize structured lightmatter interactions by engineering multiple coupling points of hybrid giant atom-conventionalenvironments without any periodic structure. We present a generic optimization method to obtain the real-space coupling sequence for multiple coupling points. We report a broadband chiral emission in a very wide frequency regime, with no analog in other quantum setups. Moreover, we show that the QED phenomena in the band gap environment, such as fractional atomic decay and dipole-dipole interactions mediated by a bound state, can be observed in our setup. Numerical results indicate that our proposal is robust against fabrication disorders of the coupling sequence. Our work opens up a new route for realizing unconventional light-matter interactions.

19 pages, 11 figures

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Cited by in corpus (14)

• Catch and release of propagating bosonic field with non-Markovian giant atom
• Avoiding decoherence with giant atoms in a two-dimensional structured environment
• Non-Markovian dynamics with a driven three-level giant atom in a semi-infinite photonic waveguide
• Simulating open quantum systems with giant atoms
• Tunable photon scattering by an atom dimer coupled to a band edge of a photonic crystal waveguide
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• Harnessing spontaneous emission of correlated photon pairs from ladder-type giant atoms
• Giant atom with disorders: Effects from imperfect couplings
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• Chirality, Nonreciprocity and Symmetries for a Giant Atom
• Nonlinear cascaded quantum network with giant emitters
• Strongly coupled giant-atom waveguide quantum electrodynamics
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