# A measure of entanglement which distinguishes between classical and quantum correlations

The Von Neumann entanglement entropy is a measure of entanglement. For an overall pure state a non zero entanglement entropy for a subsystem A indicates the degree of quantum correlation between the subsystem and the rest of the system. Also, if the overall state is mixed, then for a subsystem the entanglement entropy may be non zero. But, in this case the entanglement entropy may be due to quantum correlations or classical correlations. Is there a way to distinguish between the two?

Are there other entanglement measures which helps us to distinguish between quantum and classical correlations even though the overall state of the system is mixed?