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 …

Encoding quantum information into a set of harmonic oscillators is considered a hardware
efficient approach to mitigate noise for reliable quantum information processing. Various …

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 …

One of the greatest challenges in the fields of quantum information processing and quantum
technologies is the detailed coherent control over each and every constituent of quantum …

The partial transpose of density matrices in many-body quantum systems, in which one
takes the transpose only for a subsystem of the full Hilbert space, has been recognized as a …

We present a review of theoretical and experimental aspects of multiphoton quantum optics.
Multiphoton processes occur and are important for many aspects of matter–radiation …

We define the direct and reverse secret-key capacities of a memoryless quantum channel as
the optimal rates that entanglement-based quantum-key-distribution protocols can reach by …

We investigate the ultimate precision achievable in Gaussian quantum metrology. We derive
general analytical expressions for the quantum Fisher information matrix and for the …

We present a complete analysis of the multipartite entanglement of three-mode Gaussian
states of continuous-variable systems. We derive standard forms which characterize the …

We study the entanglement of general (pure or mixed) two-mode Gaussian states of
continuous-variable systems by comparing the two available classes of computable …