Sorkin parameter for type-I spontaneous parametric down-conversion biphotons and matter waves

We propose experimental measurements of the logarithmic negativity, which quantifies quantum correlations using Gouy phase in an asymmetric double-slit interference experiment for twin photons. This is possible because both quantities have analogous dependence with spatial confinement by slits and enables one to manipulate portion entanglement phase. In order obtain those measurements, we need work a regime where position between particles are strong, therefore investigate such biphotons. Since would like handle quantifiers through phase, analyze difference two entangled photons experiment.