Experimental aspects of indefinite causal order in quantum mechanics
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 …
processes in which the basic operations do not have definite causal relations. Originally …
Experiments on quantum causality
Quantum causality extends the conventional notion of the fixed causal structure by allowing
channels and operations to act in an indefinite causal order. The importance of such an …
channels and operations to act in an indefinite causal order. The importance of such an …
Strict hierarchy between parallel, sequential, and indefinite-causal-order strategies for channel discrimination
We present an instance of a task of minimum-error discrimination of two qubit-qubit quantum
channels for which a sequential strategy outperforms any parallel strategy. We then …
channels for which a sequential strategy outperforms any parallel strategy. We then …
Cyclic quantum causal models
Causal reasoning is essential to science, yet quantum theory challenges it. Quantum
correlations violating Bell inequalities defy satisfactory causal explanations within the …
correlations violating Bell inequalities defy satisfactory causal explanations within the …
Quantum circuits with classical versus quantum control of causal order
Quantum supermaps are transformations that map quantum operations to quantum
operations. It is known that quantum supermaps which respect a definite, predefined causal …
operations. It is known that quantum supermaps which respect a definite, predefined causal …
[HTML][HTML] Communication through coherent control of quantum channels
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 …
cannot transmit any information. In a recent Letter [3], it was however shown that if a …
Communication through quantum-controlled noise
In a recent series of works [Ebler, Phys. Rev. Lett. 120, 120502 (2018) PRLTAO 0031-9007
10.1103/PhysRevLett. 120.120502; arxiv: 1809.06655 v2; arxiv: 1810.10457 v2], it has …
10.1103/PhysRevLett. 120.120502; arxiv: 1809.06655 v2; arxiv: 1810.10457 v2], it has …
Computational advantage from the quantum superposition of multiple temporal orders of photonic gates
Models for quantum computation with circuit connections subject to the quantum
superposition principle have recently been proposed. In them, a control quantum system can …
superposition principle have recently been proposed. In them, a control quantum system can …
Time-delocalized quantum subsystems and operations: on the existence of processes with indefinite causal structure in quantum mechanics
O Oreshkov - Quantum, 2019 - quantum-journal.org
It has been shown that it is theoretically possible for there to exist higher-order quantum
processes in which the operations performed by separate parties cannot be ascribed a …
processes in which the operations performed by separate parties cannot be ascribed a …
Communication Enhancement through Quantum Coherent Control of N Channels in an Indefinite Causal-Order Scenario
In quantum Shannon theory, transmission of information is enhanced by quantum features.
Up to very recently, the trajectories of transmission remained fully classical. Recently, a new …
Up to very recently, the trajectories of transmission remained fully classical. Recently, a new …