Quantum causality

Author(s): Č. Brukner

Journal: Nature Physics

Volume: 10

Page(s): 259-263

Year: 2014

DOI Number: 10.1038/nphys2930

Link: Link to publication

Abstract:

Traditionally, quantum theory assumes the existence of a fixed background causal structure. But if the laws of quantum mechanics are applied to the causal relations, then one could imagine situations in which the causal order of events is not always fixed, but is subject to quantum uncertainty. Such indefinite causal structures could make new quantum information processing tasks possible and provide methodological tools in quantum theories of gravity. Here, I review recent theoretical progress in this emerging area.

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