The advanced notebooks, mobile phones, and Internet applications in today's world that we
use are all entrenched in classical communication bits of zeros and ones. Classical Internet …

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 …

The field of classical stochastic processes forms a major branch of mathematics. Stochastic
processes are, of course, also very well studied in biology, chemistry, ecology, geology …

In quantum Shannon theory, the way information is encoded and decoded takes advantage
of the laws of quantum mechanics, while the way communication channels are interlinked is …

Quantum mechanics allows events to happen with no definite causal order: this can be
verified by measuring a causal witness, in the same way that an entanglement witness …

Currently, there is no systematic way to describe a quantum process with memory solely in
terms of experimentally accessible quantities. However, recent technological advances …

In the standard quantum theory, the causal order of occurrence between events is
prescribed, and must be definite. This has been maintained in all conventional scenarios of …

Causal modelling provides a powerful set of tools for identifying causal structure from
observed correlations. It is well known that such techniques fail for quantum systems, unless …

Quantum computers achieve a speed-up by placing quantum bits (qubits) in superpositions
of different states. However, it has recently been appreciated that quantum mechanics also …

Investigating the role of causal order in quantum mechanics has recently revealed that the
causal relations of events may not be a priori well defined in quantum theory. Although this …