Entanglement-enhanced measurement of a completely unknown phase

By G. Xiang, B. Higgins, Dominic W. Berry, Howard M. Wiseman, G. Pryde. CLEO/QELS: 2010 Laser Science to Photonic Applications, 2010

145 citations recorded by the source corpus.

We demonstrate a method for achieving phase measurements with accuracy beyond the standard quantum limit using entangled states. A sophisticated feedback scheme means that no initial estimate of the phase is required.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/dd9921c13bf95b4e841260274b60bab366859d8f

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

A perspective on multiparameter quantum metrology: From theoretical tools to applications in quantum imaging (2019, methodology): “Quantum engineering of phase-sensitive states [16–19, 120–129] has also been suggested as a way to realise quantum-enhanced two-photon lithography [130– 132] and microscopy [133].”
Quantum Optical Technologies for Metrology, Sensing, and Imaging (2014, background): “nd adaptive protocols have been designed, which implement the optimal measurements for such states based on measurement settings that continually changed based on the results previously obtained [26],[28],[30],[35]. Also, we did not go into the details of how the effects of photon loss and decoheren”
Quantum feedback: theory, experiments, and applications (2014, background): “ry close to the quantum Heisenberg limit. There are still other phase estimation experiments presented to avoid the diﬃculty for generating highly-entangled NOON state [310–312]. For example, in Ref. [310], Xiang et al. use n-photon dual Fock state as the inputs to replace the NOON state and introdu”