Year: 2020
Type: article
Abstract: 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 Cram\'er-Rao bound.
Source: Physical Review A
Authors: Hannah Scott, Dominic Branford, Niclas Westerberg, Jonathan Leach, Erik M. Gauger
Institutions: Heriot-Watt University, University of Glasgow
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: bronze
Funders: Highlands and Islands Enterprise, Alzheimer's Society, National Institute for Health and Care Research, Scottish Funding Council, Newcastle University, Göteborgs Universitet, Medical Research Council, Engineering and Physical Sciences Research Council, Biotechnology and Biological Sciences Research Council, European Regional Development Fund, NIHR Newcastle Biomedical Research Centre, Wallenberg Centre for Molecular and Translational Medicine
OpenAlex ID: W3030191063