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  • Open Access

Steady-state multiparticle entanglement via dissipative engineering in waveguide QED

Joan Alba1,*, Jacob Thornfeldt Hansen2, Jean-Baptiste S. Béguin2, and Anders S. Sørensen1

  • 1Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen, Jagtvej 155A, 2200 Copenhagen, Denmark
  • 2QUANTOP, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark

  • *Contact author: joan.pares@nbi.ku.dk
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Phys. Rev. Research 8, 033361 – Published 24 September, 2026

DOI: https://doi.org/10.1103/npwb-yqln

Abstract

We propose a simple scalable scheme for the dissipative generation of entangled states of multiple emitters coupled to a waveguide. Our approach exploits collective interactions arising from the formation of subradiant and superradiant excited states, combined with the quantum Zeno effect. We show that, starting from an arbitrary initial state, the system deterministically evolves toward a W-type entangled steady state, with an infidelity that scales inversely with the cooperativity. The protocol is scalable to an arbitrary number of emitters. We further analyze the impact of additional experimental imperfections and present a detailed implementation based on trapped Cs133 atoms.

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Phys. Rev. Research 8, 033361– Published 24 September, 2026
  • Received 19 March 2026
  • Accepted 31 August 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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