Experimental Demonstration of Multi-Parameter Estimation at the Ultimate Quantum Limit

Benjamin Brecht,Vahid Ansari,Jano Gil-Lopez,John M. Donohue,Jaroslav Řeháček,Zdeněk Hradil,Luis L. Sánchez-Soto, Ch. Silberhorn

OSA Quantum 2.0 Conference (2020), paper QW6A.17（2020）

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摘要

We demonstrate the quantum-limited simultaneous estimation of the timing centroid, offset, and intensity imbalance of an incoherent mixture of two single-photon level pulses. Our measurement saturates the quantum Cramer-Rao lower bound.

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