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Single collective excitation of an atomic array trapped along a waveguide: A study of cooperative emission for different atomic chain configurations

Abstract : Ordered atomic arrays trapped in the vicinity of nanoscale waveguides offer original light-matter interfaces, with applications to quantum information and quantum non-linear optics. Here, we study the decay dynamics of a single collective atomic excitation coupled to a waveguide in different configurations. The atoms are arranged as a linear array and only a segment of them is excited to a superradiant mode and emits light into the waveguide. Additional atomic chains placed on one or both sides play a passive role, either reflecting or absorbing this emission. We show that when varying the geometry, such a one-dimensional atomic system could be able to redirect the emitted light, to directionally reduce or enhance it, and in some cases to localize it in a cavity formed by the atomic mirrors bounding the system.
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https://hal.sorbonne-universite.fr/hal-03292335
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Submitted on : Tuesday, July 20, 2021 - 12:24:53 PM
Last modification on : Friday, July 23, 2021 - 3:49:22 AM

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V. A. Pivovarov, L. V. Gerasimov, J. Berroir, T. Ray, J. Laurat, et al.. Single collective excitation of an atomic array trapped along a waveguide: A study of cooperative emission for different atomic chain configurations. Physical Review A, American Physical Society 2021, 103 (4), ⟨10.1103/PhysRevA.103.043716⟩. ⟨hal-03292335⟩

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