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Realization of Sub-picosecond Clock Synchronization based on Second-Order Quantum Coherence

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Abstract

Based on the second-order quantum interference between entangled photons generated by parametric down conversion, we have demonstrated a proof-of-principle experiment of synchronizing two clocks separated by 4-km fiber link. A sub-picosecond accuracy is achieved.

© 2015 Optical Society of America

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