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Units of rotational information

Abstract:

Entanglement in angular momentum degrees of freedom is a precious resource for quantum metrology and control. Here we study the conversions of this resource, focusing on Bell pairs of spin-J particles, where one particle is used to probe unknown rotations and the other particle is used as reference. When a large number of pairs are given, we show that every rotated spin-J Bell state can be reversibly converted into an equivalent number of rotated spin one-half Bell states, at a rate determine...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1088/1367-2630/aa94e5

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Computer Science
Oxford college:
St Hildas College
HKU Seed Funding for Basic Research More from this funder
Canadian Institute for Advanced Research More from this funder
Publisher:
IOP Publishing Publisher's website
Journal:
New Journal of Physics Journal website
Volume:
19
Issue:
12
Pages:
123003
Publication date:
2017-12-01
Acceptance date:
2017-10-20
DOI:
EISSN:
1367-2630
ISSN:
1367-2630
Pubs id:
pubs:743577
URN:
uri:d9b24ef9-0712-44fb-9013-b05fe18088c4
UUID:
uuid:d9b24ef9-0712-44fb-9013-b05fe18088c4
Local pid:
pubs:743577
Paper number:
12

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