Open AccessSuper-resolved phase measurements at the shot noise limit by parity measurement
Author(s) -
Lior Cohen,
D. Istrati,
L. Dovrat,
Henryk Eisenberg
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.011945
Subject(s) - physics , optics , photon , rayleigh scattering , shot noise , detector , noise (video) , limit (mathematics) , quantum limit , phase (matter) , quantum noise , quantum mechanics , quantum , mathematical analysis , mathematics , artificial intelligence , computer science , image (mathematics)
Classically, the resolution of optical measurements is limited by the Rayleigh limit and their sensitivity by the shot noise limit. However, non-classical measurements can surpass these limits. Measuring the photon number parity using a photon-number resolving detector, super resolved phase measurements up to 144 better than the Rayleigh limit are presented, with coherent states of up to 4,200 photons on average. An additional measurement that can be implemented with standard single-photon detectors is proposed and demonstrated. With this scheme, super resolution at the shot noise limit is demonstrated with coherent states of up to 200 photons on average.