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Enhanced communication with the assistance of indefinite causal order

Abstract:

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 assumed to be classical. In this Letter, we relax the assumption that quantum channels are combined classically, showing that a quantum communication network where quantum channels are combined in a superposition of different orders can achieve tasks that are impossible in conventional quantum Shannon theory. In particu...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.1103/PhysRevLett.120.120502

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Computer Science
Oxford college:
ST Hilda's College
Croucher Foundation More from this funder
Canadian Institute for Advanced Research More from this funder
Foundational Questions Institute More from this funder
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
120
Issue:
12
Pages:
120502
Publication date:
2018-03-22
Acceptance date:
2018-02-15
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Pubs id:
pubs:831683
URN:
uri:9adfae9e-b39a-45a4-8e5c-36032e5c7f96
UUID:
uuid:9adfae9e-b39a-45a4-8e5c-36032e5c7f96
Local pid:
pubs:831683

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