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We analyze an efficient quantum-communications architecture over telecom fibers using overlapping time-frequency modes and optimal receivers based on nonlinear processing.
Photon pairs sources based on nonlinear optical techniques are essential components in modern quantum optical systems. We present here a naturally occurring biological source of photon pairs—Green Fluorescent Protein (GFP)—obtained by a non-degenerate four-wave mixing (FWM).
We report observing all-optical modulation with a contrast of 80% via quantum Zeno blockade in a Lithium Niobate whispering-gallery-mode resonator at a pump peak power of 100μW.
We present a fiber-based multichannel source of correlated photon pairs in the telecommunication O-band. Coincidence-to-accidental ratios >100 (≃1) are measured between the paired (unpaired) signal-idler channels.
We present novel “interaction-free” realizations of quantum optical Fredkin gates that do not rely on direct physical coupling between the target light (signal) and the control light (pump). The interaction-free feature of such gates allow to overcome the fundamental limits of photon loss and quantum-state decoherence imposed by the signal–pump coupling. This advantage, together with the low inherent...
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