Any physical process can be represented as a quantum channel mapping an initial state to a
final state. Hence it can be characterized from the point of view of communication theory, ie …

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

Degradable quantum channels are among the only channels whose quantum and private
classical capacities are known. As such, determining the structure of these channels is a …

Quantum mechanics is compatible with scenarios where the relative order between two
events can be indefinite. Here we show that two independent instances of a noisy process …

Gaussian thermal loss channels are of particular importance to quantum communication
theory since they model realistic optical communication channels. Except for special cases …

Given the density matrix rho of a bipartite quantum state, the quantum separability problem
asks whether rho is entangled or separable. In 2003, Gurvits showed that this problem is NP …

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 …

Optical channels, such as fibres or free-space links, are ubiquitous in today's
telecommunication networks. They rely on the electromagnetic field associated with photons …

This paper establishes several converse bounds on the private transmission capabilities of a
quantum channel. The main conceptual development builds firmly on the notion of a private …

We provide a complete set of game-theoretic conditions equivalent to the existence of a
transformation from one quantum channel into another one, by means of classically …