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  • Open Access

Tripartite entanglement generation in atom-coupled dual microresonator system

Abhishek Mandal1,*, Joy Ghosh2, Maruthi Manoj Brundavanam1, and Shailendra K. Varshney3

  • *Contact author: mandalabhi350@kgpian.iitkgp.ac.in
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APS Open Sci. 1, 000026 – Published 26 May, 2026

DOI: https://doi.org/10.1103/tssz-6mdr

Abstract

Hybrid light-matter systems provide a powerful route to distributing quantum correlations across scalable architectures. Here, we investigate tripartite entanglement in a driven-dissipative system composed of two evanescently coupled optical resonators, one of which interacts with a two-level atom by Jaynes-Cummings-type interaction. In the weak-excitation regime, we derive an analytical steady-state description that captures how a single excitation becomes coherently shared among the three subsystems. By evaluating bipartite concurrences and the concurrence-fill measure, we identify parametric regimes where genuine tripartite entanglement between photon-atom-photon emerges despite photon loss and atomic decay. We further demonstrate how this entanglement can be controlled through experimentally accessible parameters, including detuning, light-matter coupling, photon tunneling, and coherent drive strength. The analytical predictions are fully supported by master-equation simulations, establishing a practical framework for engineering continuous-wave multipartite entanglement and enabling entanglement-assisted routing in hybrid photonic-atom quantum networks.

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APS Open Sci. 1, 000026– Published 26 May, 2026
Vol. 1
  • Received 21 November 2025
  • Accepted 13 May 2026
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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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