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Demonstration of a quantum CNOT gate achieves 94.7% fidelity in entangled states, suggesting efficient quantum processing.
We demonstrate a polarization-encoded quantum CNOT gate realized with a single-layer Pancharatnam–Berry phase-based dielectric metasurface. The truth table fidelity reaches 94.7% and state fidelities of the generated maximally entangled states exceed 80%.
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Xun et al. (2025) studied this question.
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