Quantum discord, a measure of genuinely quantum correlations, is generalized to continuous variable systems. For all two-mode Gaussian states, we calculate analytically the quantum discord and a related measure of classical correlations, solving an optimization over all Gaussian measurements. Almost all two-mode Gaussian states are shown to have quantum correlations, while for separable states, the discord is smaller than unity. For a given amount of entanglement, it admits tight upper and lo...Expand abstract
- Publication status:
- Publisher copy:
- Copyright date:
Quantum versus classical correlations in Gaussian states.
If you are the owner of this record, you can report an update to it here: Report update to this record