Direct and Reverse Secret-Key Capacities of a Quantum Channel
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Pirandola-2009-Direct and Reverse S.pdf
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Checksum (MD5)
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Author(s)
Braunstein, Samuel L.
Garcia-Patron Sanchez, Raul
Lloyd, Seth
Pirandola, Stefano
Date Issued
February 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Pirandola, Stefano et al. “Direct and Reverse Secret-Key Capacities of a Quantum Channel.” Physical Review Letters 102.5 (2009): 050503. (C) 2010 The American Physical Society.
Version
Final published version
Abstract
We define the direct and reverse secret-key capacities of a memoryless quantum channel as the optimal rates that entanglement-based quantum-key-distribution protocols can reach by using a single forward classical communication (direct reconciliation) or a single feedback classical communication (reverse reconciliation). In particular, the reverse secret-key capacity can be positive for antidegradable channels, where no forward strategy is known to be secure. This property is explicitly shown in the continuous variable framework by considering arbitrary one-mode Gaussian channels.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.050503
