Robustness of homodyne tomography to phase-insensitive noise
- 1 November 1997
- journal article
- research article
- Published by Taylor & Francis in Journal of Modern Optics
- Vol. 44 (11-12) , 2227-2232
- https://doi.org/10.1080/095003497152465
Abstract
We study the effects of phase-insensitive noise on homodyne measurements of a radiation density matrix. We prove that this noise has an effect equivalent to a non-unit quantum efficiency at detectors. The overall effective quantum efficiency η∗ of the measurement is evaluated in terms of the quantum efficiency at detectors and of the average number of noise photons added to the radiation field. For pure Gaussian-displacement noise, we show that half a photon of noise is enough to prevent the homodyne measurement of the density matrix.Keywords
This publication has 0 references indexed in Scilit: