One of the best signatures of nonclassicality in a quantum system is the existence of
correlations that have no classical counterpart. Different methods for quantifying the …

We review concepts and methods associated with quantum discord and related topics. We
also describe their possible connections with other aspects of quantum information and …

In contrast with entanglement, as measured by concurrence, in general, quantum discord
does not possess the property of monogamy; that is, there is no tradeoff between the …

Correlations are a very important tool in the study of multipartite systems, for both classical
and quantum ones. The discussion about the quantum nature of correlations permeates …

By using the quantum-memory-assisted entropic uncertainty relation (EUR), we derive a
computable tight upper bound for quantum discord, which applies to an arbitrary bipartite …

By use of the generalized variance for any operator (not necessarily Hermitian), we
introduce the uncertainty of quantum channels as the sum of the generalized variances for …

Uncertainty principle plays a vital role in quantum physics. The Wigner–Yanase skew
information characterizes the uncertainty of an observable with respect to the measured …

We revisit the upper bound of quantum discord given by the von Neumann entropy of the
measured subsystem. Using the Koashi-Winter relation, we obtain a tradeoff between the …

There has been an increasing interest in exploring quantities associated with quantum
information at colliders. We perform a detailed analysis describing how to measure the …

How strongly can one system be correlated with another? In the classical world, this basic
question concerning correlative capacity has a very satisfying answer: The “effective size” of …