It is well known that use can be made of the nonclassical properties of light to significantly improve the precision of quantum-limited physical measurements. In particular, optical interference effects can be separated in classical, giving the signal, and nonclassical, giving the quantum noise. In this context, the interplay of classical and quantum indistinguishability becomes very interesting to explore. I will present two of our recent experimental results: The generalization of Hong-Ou-Mandel interferometry to large photon numbers and the demonstration of heterodyne polarimetry 4.8 dB below the shot noise. An extension of this work to the generation of bright entangled beams will also be discussed.

Contact: Luis A. Orozco.