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Optimal quantum phase estimation.

Abstract:

By using a systematic optimization approach, we determine quantum states of light with definite photon number leading to the best possible precision in optical two-mode interferometry. Our treatment takes into account the experimentally relevant situation of photon losses. Our results thus reveal the benchmark for precision in optical interferometry. Although this boundary is generally worse than the Heisenberg limit, we show that the obtained precision beats the standard quantum limit, thus ...

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Publication status:
Published

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Authors


Demkowicz-Dobrzanski, R More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Lundeen, JS More by this author
Wasilewski, W More by this author
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Journal:
Physical review letters
Volume:
102
Issue:
4
Pages:
040403
Publication date:
2009-01-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:70a060bb-46a7-486a-b687-9eec46c6f290
Source identifiers:
19089
Local pid:
pubs:19089
Language:
English

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