Bell tests for continuous-variable systems using hybrid measurements and heralded amplifiers

We present Bell tests for optical continuous-variable systems, combining both hybrid measurements (i.e., measuring both particle and wave aspects of light) and heralded amplifiers. We discuss two types of schemes, in which the amplifier is located either at the source or at the parties' laborat...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2012-04, Vol.85 (4), Article 042116
Main Authors: Brask, Jonatan Bohr, Brunner, Nicolas, Cavalcanti, Daniel, Leverrier, Anthony
Format: Article
Language:English
Subjects:
Amplifiers
Bells
Inclusions
Transmission loss
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Summary:We present Bell tests for optical continuous-variable systems, combining both hybrid measurements (i.e., measuring both particle and wave aspects of light) and heralded amplifiers. We discuss two types of schemes, in which the amplifier is located either at the source or at the parties' laboratories. The inclusion of amplifiers helps to reduce the detrimental effect of losses in the setup. In particular, we show that the requirements for a loophole-free Bell test in terms of detection efficiency and transmission losses are significantly reduced, approaching the experimentally accessible regime.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.85.042116