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  • Letter
  • Open Access

Fate of the Mollow triplet in strongly coupled atomic arrays

Orazio Scarlatella and Nigel R. Cooper

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Phys. Rev. A 110, L041305 – Published 30 October, 2024

DOI: https://doi.org/10.1103/PhysRevA.110.L041305

Abstract

Subwavelength arrays of quantum two-level emitters have emerged as an interesting platform displaying prominent collective effects that can be harnessed for applications. Here, we study such arrays under strong coherent driving, realizing an open quantum many-body problem in a strongly nonlinear regime. For this we introduce an approach to this problem in terms of a dynamical mean-field theory, paving the way for further studies. We show that the spectrum of scattered light, characterized by the famous Mollow triplet for a single atom, develops a characteristic line shape with flat sidebands determined by dipolar interactions and relevant for experiments. Remarkably, this is to some extent independent of the specific geometry, but is sensitive to the ordered arrangement of the atoms. This line shape therefore characterizes atomic arrays and distinguishes them from disordered ensembles and noninteracting emitters.

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Phys. Rev. A 110, L041305– Published 30 October, 2024
  • Received 7 March 2024
  • Revised 19 September 2024
  • Accepted 15 October 2024
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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