Unbalanced Homodyne Correlation Measurements
Quantum Physics
2016-04-27 v2
Abstract
A method is introduced which allows to measure normal-ordered moments of the displaced photon-number operator up to high orders. It is based on unbalanced homodyne correlation measurements, the local oscillator being replaced by a displaced dephased laser. The measured moments yield a simple approximation of the full quantum state, which is obtained without the need of photon-number resolution. Quantum properties of light are efficiently certified through the direct detection of normal-ordered observables, which is illustrated for a weakly squeezed vacuum and a single-photon-added thermal state.
Cite
@article{arxiv.1511.01723,
title = {Unbalanced Homodyne Correlation Measurements},
author = {B. Kühn and W. Vogel},
journal= {arXiv preprint arXiv:1511.01723},
year = {2016}
}