Abstract
We determine the limit to the maximum achievable sensitivity in the estimation of a scalar parameter from the information contained in an optical image in the presence of quantum noise. This limit, based on the Cramer-Rao bound and valid for any image processing protocol, is calculated for a shot noise limited image, for a locally squeezed light, and for a single-mode squeezed light in a well-defined "noise mode". In addition, we exhibit an image processing protocol that allows us to reach the limits in the different cases.
Original language | English |
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Article number | 44001 |
Journal | Europhysics Letters |
Volume | 81 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Feb 2008 |