Beyond coincidence in Hong-Ou-Mandel interferometry

Scott, H., Branford, D., Westerberg, N. , Leach, J. and Gauger, E. M. (2020) Beyond coincidence in Hong-Ou-Mandel interferometry. Physical Review A: Atomic, Molecular and Optical Physics, 102(3), 033714. (doi: 10.1103/PhysRevA.102.033714)

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The Hong-Ou-Mandel effect provides a mechanism to determine the distinguishability of a photon pair by measuring the bunching rates of two photons interfering at a beam splitter. Of particular interest is the distinguishability in time, which can be used to probe a time delay. Photon detectors themselves give some timing information, however, while that resolution may dwarf that of an interferometric technique, typical analyses reduce the interference to a binary event, neglecting temporal information in the detector. By modeling detectors with number and temporal resolution we demonstrate a greater precision than coincidence rates or temporal data alone afford. Moreover, the additional information can allow simultaneous estimation of a time delay alongside calibration parameters, opening up the possibility of calibration-free protocols and approaching the precision of the quantum Cramér-Rao bound.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Westerberg, Dr Niclas and Leach, Mr Jonathan
Authors: Scott, H., Branford, D., Westerberg, N., Leach, J., and Gauger, E. M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review A: Atomic, Molecular and Optical Physics
Publisher:American Physical Society
ISSN (Online):1094-1622
Copyright Holders:Copyright © 2020 American Physical Society
First Published:First published in Physical Review A: Atomic, Molecular and Optical Physics 102(3):033714
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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