Security of continuous-variable quantum cryptography with Gaussian postselection

Walk, Nathan, Ralph, Timothy C., Symul, Thomas and Lam, Ping Koy (2013) Security of continuous-variable quantum cryptography with Gaussian postselection. Physical Review A, 87 2: . doi:10.1103/PhysRevA.87.020303

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Author Walk, Nathan
Ralph, Timothy C.
Symul, Thomas
Lam, Ping Koy
Title Security of continuous-variable quantum cryptography with Gaussian postselection
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2013-02-21
Sub-type Article (original research)
DOI 10.1103/PhysRevA.87.020303
Open Access Status File (Publisher version)
Volume 87
Issue 2
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2014
Language eng
Abstract We extend the security analysis of continuous variable quantum-key-distribution protocols using a family of post selection schemes to account for arbitrary eavesdropping attacks. We show that the postselection protocol is equivalent to a virtual entanglement-based protocol including a distillation stage. We introduce a particular ‘Gaussian’ post selection and demonstrate that the security can be calculated using only experimentally accessible quantities. Finally, we explicitly evaluate the performance for the case of a noisy Gaussian channel in the limit of unbounded key length and find improvements over all pre-existing continuous variable protocols in realistic regimes.
Keyword Key distribution
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article # 020303

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 28 times in Scopus Article | Citations
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Created: Sun, 24 Mar 2013, 00:24:40 EST by System User on behalf of Physics