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Theoretical framework for quantum networks
We present a framework to treat quantum networks and all possible transformations thereof, including as special cases all possible manipulations of quantum states, measurements, and channels, suchExpand
Probabilistic theories with purification
We investigate general probabilistic theories in which every mixed state has a purification, unique up to reversible channels on the purifying system. We show that the purification principle isExpand
Informational derivation of quantum theory
We derive quantum theory from purely informational principles. Five elementary axioms - causality, perfect distinguishability, ideal compression, local distinguishability, and pure conditioning -Expand
Quantum computations without definite causal structure
We show that quantum theory allows for transformations of black boxes that cannot be realized by inserting the input black boxes within a circuit in a pre-defined causal order. The simplest exampleExpand
Enhanced Communication with the Assistance of Indefinite Causal Order.
TLDR
This Letter shows that two identical copies of a completely depolarizing channel become able to transmit information when they are combined in a quantum superposition of two alternative orders, counter to the intuition that if two communication channels are identical, using them in different orders should not make any difference. Expand
Quantum circuit architecture.
TLDR
Unexplored quantum processing tasks, such as cloning and storing or retrieving of gates, can be optimized, along with setups for tomography and discrimination or estimation of quantum circuits. Expand
Transforming quantum operations: Quantum supermaps
We introduce the concept of quantum supermap, describing the most general transformation that maps an input quantum operation into an output quantum operation. Since quantum operations include asExpand
Teleportation transfers only speakable quantum information
We show that a quantum clock cannot be teleported without prior synchronization between sender and receiver: every protocol using a finite amount of entanglement and an arbitrary number of rounds ofExpand
Perfect discrimination of no-signalling channels via quantum superposition of causal structures
A no-signalling channel transforming quantum systems in Alice's and Bob's local laboratories is compatible with two different causal structures: ($A⪯B$) Alice's output causally precedes Bob's inputExpand
Quantum Theory from First Principles - An Informational Approach
Carathéodory’s theorem, 173 category theory, 5 strictly symmetric monoidal, 5 causal chain, 142 causality, 20, 135 axiom, 141 causal theories, 141 in philosophy, 6 no signaling from the future, 142Expand
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