The science of quantum information has arisen over the last two decades centered on the
manipulation of individual quanta of information, known as quantum bits or qubits. Quantum …

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 …

Quantum Continuous Variables introduces the theory of continuous variable quantum
systems, from its foundations based on the framework of Gaussian states to modern …

The study of Gaussian states has arisen to a privileged position in continuous variable
quantum information in recent years. This is due to vehemently pursued experimental …

Quantum discord characterizes “nonclassicality” of correlations in quantum mechanics. It
has been proposed as the key resource present in certain quantum communication tasks …

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 …

Einstein-Podolsky-Rosen steering incarnates a useful nonclassical correlation which sits
between entanglement and Bell nonlocality. While a number of qualitative steering criteria …

Quantum information theory is built upon the realisation that quantum resources like
coherence and entanglement can be exploited for novel or enhanced ways of transmitting …

Dakic, Vedral, and Brukner [arxiv: 1004.0190 (2010)] introduced a geometric measure of
quantum discord and derived an explicit formula for any two-qubit state. This measure is …

We study the computational complexity of quantum discord (a measure of quantum
correlation beyond entanglement), and prove that computing quantum discord is NP …