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Quantum phase estimation with lossy interferometers

Abstract:

We give a detailed discussion of optimal quantum states for optical two-mode interferometry in the presence of photon losses. We derive analytical formulae for the precision of phase estimation obtainable using quantum states of light with a definite photon number and prove that maximization of the precision is a convex optimization problem. The corresponding optimal precision, i.e., the lowest possible uncertainty, is shown to beat the standard quantum limit thus outperforming classical inte...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.80.013825

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Role:
Author
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Journal:
PHYSICAL REVIEW A
Volume:
80
Issue:
1
Publication date:
2009-07-05
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:f3c1ed5f-9f6c-4d85-9e44-e951e660f4c7
Source identifiers:
4131
Local pid:
pubs:4131
Language:
English

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