This technique demonstrates polarization-frequency controlled-NOT gate performance, suggesting potential for efficient entanglement distillation.
We develop a high-fidelity controlled-NOT gate between photonic polarization and frequency, leveraging direction-dependent electro-optic phase modulation in a fiber Sagnac loop. This design could facilitate massively parallelizable entanglement distillation with polarization-frequency resources in lightwave networks.
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Lu et al. (2025) studied this question.
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