Metasurface-mediated quantum entanglement via bound states in the continuum

• URL: http://arxiv.org/abs/2505.15751v1
• Date: Wed, 21 May 2025 16:57:47 GMT
• Title: Metasurface-mediated quantum entanglement via bound states in the continuum
• Authors: Hannah Riley, Emmanuel Lassalle, Diego Romero Abujetas, Adam Stokes, Ramon Paniagua-Dominguez, Ahsan Nazir,
• Abstract summary: Inter-QE entanglement is generated faster than in free space, is significantly amplified, and persists over several resonant wavelengths.<n>Our results establish all-dielectric metasurfaces as a practical, scalable platform for leading-edge quantum photonics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Scalable quantum technologies demand entanglement between many distant quantum emitters (QEs), for which we propose using high-$Q$, spatially extended bound states in the continuum (BICs) in all-dielectric metasurfaces. We show that QE-BIC coupling efficiencies ($\beta$-factors) can exceed $80\%$, comparable to waveguides even without further mode engineering, but within a 2D geometry that naturally accommodates large QE arrays and relaxes strict emitter placement. Inter-QE entanglement is generated faster than in free space, is significantly amplified, and persists over several resonant wavelengths. Optimality requires large $\beta$-factors but moderately small Purcell factors. Our results establish all-dielectric metasurfaces as a practical, scalable platform for leading-edge quantum photonics.

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