Operational discord measure for Gaussian states with Gaussian measurements

Operational discord measure for Gaussian states with Gaussian measurements

Blog Article

We introduce an operational discord-type measure for quantifying nonclassical correlations in bipartite Gaussian states based on using Gaussian measurements.We refer to this measure as operational Gaussian discord (OGD).It is defined as the difference between the ROLL ON ACTIVE DEO entropies of two conditional probability distributions associated to one subsystem, which are Navigational Compasses obtained by performing optimal local and joint Gaussian measurements.We demonstrate the operational significance of this measure in terms of a Gaussian quantum protocol for extracting maximal information about an encoded classical signal.As examples, we calculate OGD for several Gaussian states in the standard form.