In quantum communication networks, wires represent well-defined trajectories along which
quantum systems are transmitted. In spite of this, trajectories can be used as a quantum …

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 …

We describe and implement a family of entangling gates activated by radio-frequency flux
modulation applied to a tunable transmon that is statically coupled to a neighboring …

Shannon's theory of information was built on the assumption that the information carriers
were classical systems. Its quantum counterpart, quantum Shannon theory, explores the …

Communication in a network generally takes place through a sequence of intermediate
nodes connected by communication channels. In the standard theory of communication, it is …

Quantum supermaps are transformations that map quantum operations to quantum
operations. It is known that quantum supermaps which respect a definite, predefined causal …

Measures are introduced to quantify the degree of superposition in mixed states with respect
to orthogonal decompositions of the Hilbert space of a quantum system. These …

A series of recent works has shown that placing communication channels in a coherent
superposition of alternative configurations can boost their ability to transmit information …

A completely depolarising quantum channel always outputs a fully mixed state and thus
cannot transmit any information. In a recent Letter [3], it was however shown that if a …

Any quantum resource theory is based on free states and free operations, ie states and
operations which can be created and performed at no cost. In the resource theory of …