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Academia quantum.

On-chip coupling and synchronization of quantum emitters using superradiant coupling channels

Roman Shugayev

Published Dec 2, 2025• 0 citations
Publisher

Abstract

Superradiance offers an efficient approach for coupling discrete quantum emitters via collective fluorescence. In this work, we suggest a method for the controlled coupling and synchronization of distant integrated photonic emitters using superradiance. Our theoretical modeling and analysis using electromagnetic and Master Equation methods for a case of nanodiamond/SiN heterogenous photonic platform confirms efficient superradiant coupling of distant emitters and a good degree of spurious emission isolation. This approach can offer a path to the scalable generation of multipartite photonic states, such as NOON states, and can enable efficient cluster state generation and one-way quantum computing approaches.

DOI
10.20935/acadquant8025

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Superradiance offers an efficient approach for coupling discrete quantum emitters via collective fluorescence. In this work, we suggest a method for the controlled coupling and synchronization of distant integrated photonic emitters using superradiance. Our theoretical modeling and analysis using electromagnetic and Master Equation methods for a case of nanodiamond/SiN heterogenous photonic platform confirms efficient superradiant coupling of distant emitters and a good degree of spurious emission isolation. This approach can offer a path to the scalable generation of multipartite photonic states, such as NOON states, and can enable efficient cluster state generation and one-way quantum computing approaches.
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Photon-mediated coupling between distant matter qubits may enable secure communication over long distances, the implementation of distributed quantum computing schemes, and the exploration of new regimes of many-body quantum dynamics. Solid-state quantum emitters coupled to nanophotonic devices represent a promising approach towards these goals, as they combine strong lightmatter interaction and high photon collection efficiencies. However, nanostructured environments introduce mismatch and diffusion in optical transition frequencies of emitters, making reliable photonmediated entanglement generation infeasible. Here we address this long-standing challenge by employing silicon-vacancy color centers embedded in electromechanically deflectable nanophotonic waveguides. This electromechanical strain control enables control and stabilization of optical resonance between two silicon-vacancy centers on the hour timescale. Using this platform, we observe the signature of an entangled, superradiant state arising from quantum interference between two spatially separated emitters in a waveguide. This demonstration and the developed platform constitute a crucial step towards a scalable quantum network with solid-state quantum emitters.