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Realistic quantum-enhanced phase estimation

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If you have a question about this talk, please contact Lawrence Ioannou.

It is widely recognized that the use of nonclassical states of light allows one to overcome the shot-noise limit in precision phase measurements. The enhancement comes from exploiting inherently quantum features, such as entanglement, that are sensitive to decoherence mechanisms present in realistic measurements. In this talk we present designs for quantum-enhanced phase sensing that are robust to experimental imperfections, such as photon loss. The ultimate precision of such schemes exceeds the shot-noise limit, but is inevitably worse than the ultimate quantum mechanical Heisenberg limit for the decoherence-free scenario.

This talk is part of the CQIF Seminar series.

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