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Suppression of quantum correlations in a clean-disordered atom-nanophotonic interface

I Gusti Ngurah Yudi Handayana1,2,3,*, Yi-Lin Tsao3,4, and H. H. Jen3,1,5,†

  • *Contact author: ngurahyudi@unram.ac.id
  • †Contact author: sappyjen@gmail.com
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Phys. Rev. Research 7, 023303 – Published 24 June, 2025

DOI: https://doi.org/10.1103/7ywr-kd8y

Abstract

Quantum correlations are essential to the emergent behaviors of quantum systems, supporting key phenomena such as localization or delocalization of particles, quantum avalanches in many-body localized systems, and quantum information transfer. In open atom-nanophotonic systems characterized by long-range spin-exchange interactions, we examine the influence of clean system size on high-order quantum correlations among a clean-disordered atomic array with multiple atomic excitations. By initializing the system far from equilibrium, we observe a suppression of quantum correlations for localized atomic excitations in the disordered zone as the clean system size increases, showcasing the delocalization behavior in the high-order spin-exchange processes. The calculation of the entanglement entropy at the interface further substantiates this thermalizing effect. Our results manifest distinct quantum correlations enabled by long-range interactions mediated by the waveguide, enhance the theoretical comprehension of clean-disordered systems, and provide insights to nonequilibrium quantum dynamics in an atom-nanophotonic platform.

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Phys. Rev. Research 7, 023303– Published 24 June, 2025
  • Received 1 January 2025
  • Accepted 5 June 2025
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