In the past decade, the toolkit of quantum information has been expanded to include
processes in which the basic operations do not have definite causal relations. Originally …

In the theory of quantum communications, a deeper structure has been recently unveiled,
showing that the capacity does not completely characterize the channel ability to transmit …

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

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 …

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 generic qubit unitary operator affected by depolarizing noise is duplicated and inserted in
a quantum switch process, realizing a superposition of causal orders. The characterization …

Models for quantum computation with circuit connections subject to the quantum
superposition principle have recently been proposed. In them, a control quantum system can …

Completely depolarizing channels are often regarded as the prototype of physical processes
that are useless for communication: any message that passes through them along a well …

The field of indefinite causal order (ICO) has seen a recent surge in interest. Much of this
research has focused on the quantum switch, wherein multiple parties act in a superposition …