Optical interferometry in the presence of large phase diffusion
Marco G. Genoni, Stefano Olivares, Davide Brivio, S. Cialdi, Daniele Cipriani, Alberto Santamato, Stefano Vezzoli, Matteo G. A. Paris · Physical Review A · 2012
Phase diffusion represents a crucial obstacle toward 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.