Two-photon spectral coherency matrix and multi-parameter optical entanglement
Cristian Bonato, Alexander V. Sergienko, Bahaa E. A. Saleh, Malvin Carl Teich · 2007
We introduce the concept of two-photon spectral coherency matrix and the spectral two-photon Stokes parameters as a counterpart to the classical coherency matrix of broadband polarized light. We discuss its use for characterizing frequency-polarization optical entanglement.