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Authors: Lewis A. Clark ; Adam Stokes ; M. Mubashir Khan ; Gangcheng Wang and Almut Beige

Affiliation: University of Leeds, United Kingdom

Keyword(s): Quantum Metrology, Optical Cavities, Quantum Feedback.

Related Ontology Subjects/Areas/Topics: Lasers ; Optics ; Photonics, Optics and Laser Technology ; Quantum Information and Measurement ; Spectroscopy, Imaging and Metrology

Abstract: There are a number of different strategies to measure the phase shift between two pathways of light more efficiently than suggested by the standard quantum limit. One way is to use highly entangled photons. Another way is to expose photons to a non-linear or interacting Hamiltonian. This paper emphasises that the conditional dynamics of open quantum systems provides an interesting additional tool for quantum-enhanced metrology. As a concrete example, we review a recent scheme which exploits the conditional dynamics of a laser-driven optical cavity with spontaneous photon emission inside a quantum feedback loop. Deducing information from second-order photon correlation measurements requires neither optical non-linearities nor entangled photons and should therefore be of immediate practical interest.

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Paper citation in several formats:
A. Clark, L.; Stokes, A.; Mubashir Khan, M.; Wang, G. and Beige, A. (2017). Quantum-enhanced Metrology without Entanglement based on Optical Cavities with Feedback. In Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS; ISBN 978-989-758-223-3; ISSN 2184-4364, SciTePress, pages 223-229. DOI: 10.5220/0006141702230229

@conference{photoptics17,
author={Lewis {A. Clark}. and Adam Stokes. and M. {Mubashir Khan}. and Gangcheng Wang. and Almut Beige.},
title={Quantum-enhanced Metrology without Entanglement based on Optical Cavities with Feedback},
booktitle={Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS},
year={2017},
pages={223-229},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006141702230229},
isbn={978-989-758-223-3},
issn={2184-4364},
}

TY - CONF

JO - Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS
TI - Quantum-enhanced Metrology without Entanglement based on Optical Cavities with Feedback
SN - 978-989-758-223-3
IS - 2184-4364
AU - A. Clark, L.
AU - Stokes, A.
AU - Mubashir Khan, M.
AU - Wang, G.
AU - Beige, A.
PY - 2017
SP - 223
EP - 229
DO - 10.5220/0006141702230229
PB - SciTePress

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