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- Title
The Efficiency of Repeaters Based on the Einstein–Podolsky–Rosen Effect for Quantum Cryptography in a Damping Channel.
- Authors
Molotkov, S. N.
- Abstract
Based on the fundamental Holevo inequality and on the direct calculations, it is argued that the number of commitments required per one bit in a key in a damping channel increases exponentially with channel length. It is shown that the conclusion drawn recently by Duan etal. [4] that the exponential increase in resources for quantum cryptography in a damping channel can be reduced to the polynomial law by generating a through Einstein–Podolsky–Rosen pair is erroneous. Therefore, the results of [4] do not solve the fundamental problem restricting practical application of quantum cryptography at distances larger than the damping length. © 2001 MAIK “Nauka / Interperiodica”.
- Subjects
EINSTEIN-Podolsky-Rosen experiment; QUANTUM theory
- Publication
JETP Letters, 2001, Vol 74, Issue 10, p517
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1446547