Bell state analyzer for spectrally distinct photons
arXiv:2109.06385 · doi:10.1364/OPTICA.443302
Abstract
We demonstrate a Bell state analyzer that operates directly on frequency mismatch. Based on electro-optic modulators and Fourier-transform pulse shapers, our quantum frequency processor design implements interleaved Hadamard gates in discrete frequency modes. Experimental tests on entangled-photon inputs reveal accuracies of 98\% for discriminating between the and frequency-bin Bell states. Our approach resolves the tension between wavelength-multiplexed state transport and high-fidelity Bell state measurements, which typically require spectral indistinguishability.
arXiv comment5 pages, 3 figures
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