Virtual noiseless amplification

Janousek, Jiri, Chrzanowski, Helen, Hosseini, Sarah, Assad, Syed, Symul, Thomas, Walk, Nathan, Ralph, Tim and Lam, Ping Koy (2013). Virtual noiseless amplification. In: 2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference (CLEO EUROPE/IQEC). Proceedings. CLEO/EUROPE - IQEC 2013: Conference on Lasers and Electro-Optics - International Quantum Electronics Conference, Munich, Germany, (IB_P_3-IB_P_3). 13-16 May, 2013. doi:10.1109/CLEOE-IQEC.2013.6801727


Author Janousek, Jiri
Chrzanowski, Helen
Hosseini, Sarah
Assad, Syed
Symul, Thomas
Walk, Nathan
Ralph, Tim
Lam, Ping Koy
Title of paper Virtual noiseless amplification
Conference name CLEO/EUROPE - IQEC 2013: Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
Conference location Munich, Germany
Conference dates 13-16 May, 2013
Proceedings title 2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference (CLEO EUROPE/IQEC). Proceedings
Journal name Optics InfoBase Conference Papers
Place of Publication Piscataway, NJ, USA
Publisher IEEE
Publication Year 2013
Sub-type Other
DOI 10.1109/CLEOE-IQEC.2013.6801727
Open Access Status
ISBN 9781479905935
9781479905942
ISSN 2162-2701
Start page IB_P_3
End page IB_P_3
Total pages 1
Language eng
Formatted Abstract/Summary
The unavoidable addition of noise during amplification is a well known signature of quantum mechanics. It is at the heart of fundamental results such as the no-cloning theorem, quantum limited metrology, quantum key distribution and the impossibility of increasing entanglement by local operations. Nonetheless one can still avoid the unavoidable by moving to a non-deterministic protocol. This novel concept and a linear optics implementation have been proposed and experimentally realised for the case of amplifying coherent states, qubits and the concentration of phase information. All these were extremely challenging experiments, with only demonstrating entanglement distillation and none directly showing the EPR distillation necessary for application to CV QKD. Furthermore the success probability of these experiments was substantially worse than the theoretical considerations would imply. However as has been noted it is possible to virtually implement noiseless amplification (NLA) and hence entanglement distillation via post-selective measurements, achieving significant distillation with a much improved probability of success.
Subjects 3105 Instrumentation
3107 Atomic and Molecular Physics, and Optics
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Mathematics and Physics
 
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Created: Tue, 05 Aug 2014, 15:04:17 EST by Jon Swabey on behalf of Physics