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Quantum amplification and purification of noisy coherent states

Abstract:

Quantum-limited amplifiers increase the amplitude of quantum signals at the price of introducing additional noise. Quantum purification protocols operate in the reverse way, by reducing the noise while attenuating the signal. Here we investigate a scenario that interpolates between these two extremes. We search for the optimal physical process that generates M approximate copies of a pure and amplified coherent state, starting from N copies of a noisy coherent state with Gaussian modulation. ...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevA.95.042303

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Computer Science
Oxford college:
St Hilda's College
Role:
Author
HKU Seed Funding for Basic Research More from this funder
Canadian Institute for Advanced Research More from this funder
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review A Journal website
Volume:
95
Issue:
4
Article number:
042303
Publication date:
2017-04-04
DOI:
EISSN:
2469-9934
ISSN:
2469-9926
Source identifiers:
733263
Pubs id:
pubs:733263
UUID:
uuid:5a8cd1f5-22b9-45b2-a262-e281fe70afd8
Local pid:
pubs:733263
Deposit date:
2017-11-06

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