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Robust tripartite entanglement generation via correlated noise in spin qubits

Sander Driessen1,2, Ji Zou3,4,*, Even Thingstad1, Jelena Klinovaja1, and Daniel Loss1,3,4,5

  • *Contact author: ji.zou@kfupm.edu.sa
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Phys. Rev. Research 8, 033153 – Published 10 August, 2026

DOI: https://doi.org/10.1103/5mr9-84qh

Abstract

We investigate the generation of genuine tripartite entanglement in a triangular spin-qubit system due to spatially correlated noise. In particular, we demonstrate how the formation of a highly entangled dark state, a W state, enables robust, long-lived tripartite entanglement. Surprisingly, we find that environmentally induced coherent coupling does not play a crucial role in sustaining this entanglement. This contrasts sharply with the two-qubit case, where the induced coupling significantly influences the entanglement dynamics. Furthermore, we explore two promising approaches to enhance the tripartite entanglement by steering the system toward the dark state: postselection and coherent driving. Our findings offer a robust method for generating high-fidelity tripartite entangled states with potential applications in quantum computation.

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Phys. Rev. Research 8, 033153– Published 10 August, 2026
  • Received 1 July 2025
  • Revised 10 February 2026
  • Accepted 10 July 2026
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