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 …

Is entanglement an exclusive feature of quantum systems, or is it common to all non-
classical theories? And if this is the case, how strong is quantum mechanical entanglement …

Quantum discord, a kind of quantum correlation, is defined as the difference between
quantum mutual information and classical correlation in a bipartite system. In general, this …

Quantum discord, as introduced by Olliver and Zurek [Phys. Rev. Lett. 88, 017901 (2001)], is
a measure of the discrepancy between two natural yet different quantum analogs of the …

In the study of open quantum systems, memory effects are usually ignored, and this leads to
dynamical semigroups and Markovian dynamics. However, in practice, non-Markovian …

Quantum discord quantifies nonclassical correlations in a quantum system including those
not captured by entanglement. Thus, only states with zero discord exhibit strictly classical …

In contrast to the seminal entanglement-separability paradigm widely used in quantum
information theory, we introduce a quantum-classical dichotomy in order to classify and …

It is well known that many operations in quantum information processing depend largely on
a special kind of quantum correlation, that is, entanglement. However, there are also …

Channel-state duality refers to the correspondence between quantum channels and bipartite
states, and it is extremely useful and fruitful in quantum information theory. It is often called …

We study the level surfaces of quantum discord for a class of two-qubit states with parallel
nonzero Bloch vectors. The dynamic behavior of quantum discord under decoherence is …