Experimental phase detection at the quantum limit with coherent state interferometry
Juan F. Hodelin, G. Khoury, Luca Pezzè, Augusto Smerzi, Dirk Bouwmeester · 2008
We experimentally demonstrate phase sensitivity at the standard quantum limit independent of phase using Bayesian phase estimation. This technique is unbiased and saturates the Cramer-Rao lower bound representing the optimum technique using coherent states.