Beyond coincidence: using all the data in Hong-Ou-Mandel interferometry
arXiv:2005.14696 · doi:10.1103/PhysRevA.102.033714
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 modelling 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.
20 pages, 11 figures
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- Interferometric signature of different spectral symmetries of biphoton states
- Momentum-entangled two-photon interference for quantum-limited transverse-displacement estimation
- Engineering of Hong-Ou-Mandel interference with effective noise
- Semiparametric estimation in Hong-Ou-Mandel interferometry