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Quantum enhanced multiple phase estimation.

Abstract:

We study the simultaneous estimation of multiple phases as a discretized model for the imaging of a phase object. We identify quantum probe states that provide an enhancement compared to the best quantum scheme for the estimation of each individual phase separately as well as improvements over classical strategies. Our strategy provides an advantage in the variance of the estimation over individual quantum estimation schemes that scales as O(d), where d is the number of phases. Finally, we st...

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Publication status:
Published

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Authors


Humphreys, PC More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics, Example OA
Journal:
Physical review letters
Volume:
111
Issue:
7
Pages:
070403
Publication date:
2013-08-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:ab3d3cee-e811-434b-a167-494449b5a6dc
Source identifiers:
420823
Local pid:
pubs:420823
Language:
English

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