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Measurement-device-independent quantum key distribution (MDI QKD) is a promising and practical protocol for remote secret sharing, where the Hong-Ou-Mandel (HOM) type interference in the measurement side provides a simple and economic way to resist malicious attacks on the measurement devices. Because the HOM interference greatly indicates the performance of MDI QKD system, its interferential behavior...
We demonstrate a photon-number-resolving homodyne detector based on InGaAs PIN photodiodes with active phase compensation. Our detector preserves the capable of detecting single photon and allows 20 photons to be precisely discriminated.
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