Phase diffusion represents a crucial obstacle towards the implementation of high precision interferometric measurements and phase shift based communication channels. Here we present a nearly optimal interferometric scheme based on homodyne detection and coherent signals for the detection of a phase shift in the presence of large phase diffusion. In our scheme the ultimate bound to interferometric sensitivity is achieved already for a small number of measurements, of the order of hundreds, without using nonclassical light.
@article{arxiv.1203.2956,
title = {Optical interferometry in the presence of large phase diffusion},
author = {Marco G. Genoni and Stefano Olivares and Davide Brivio and Simone Cialdi and Daniele Cipriani and Alberto Santamato and Stefano Vezzoli and Matteo G. A. Paris},
journal= {arXiv preprint arXiv:1203.2956},
year = {2013}
}