All our former experience with application of quantum theory seems to say that what is
predicted by quantum formalism must occur in the laboratory. But the essence of quantum …

The manner in which states of some quantum systems become effectively classical is of
great significance for the foundations of quantum physics, as well as for problems of …

Two classically identical expressions for the mutual information generally differ when the
systems involved are quantum. This difference defines the quantum discord. It can be used …

Abstract The Jaynes-Cummings model (JCM), a soluble fully quantum mechanical model of
an atom in a field, was first used (in 1963) to examine the classical aspects of spontaneous …

When we were preparing the first edition of this book, the concept of de coherence was
known only to a minority of physicists. In the meantime, a wealth of contributions has …

Entanglement of the properties of two separated particles constitutes a fundamental
signature of quantum mechanics and is a key resource for quantum information science. We …

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 …

We analyze the possibility of copying (that is, cloning) arbitrary states of a quantum-
mechanical spin-1/2 system. We show that there exists a ''universal quantum-copying …

The ability to generate particles from the quantum vacuum is one of the most profound
consequences of Heisenberg's uncertainty principle. Although the significance of vacuum …

Multidimensional quantum walks can exhibit highly nontrivial topological structure, providing
a powerful tool for simulating quantum information and transport systems. We present a …