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- Title
Limiting Rate of Secret-Key Generation in Quantum Cryptography in Spacetime.
- Authors
Molotkov, S. N.
- Abstract
The fundamental restrictions on the maximum admissible rate of secret-key commitment in quantum cryptography in real time are discussed. It is shown that the maximum rate in a quantum channel with limited transmission band is achieved in a cryptosystem on orthogonal states. The dimensionless rate (the number of bits per unit time frequency band through unit of the channel) is determined by the universal function C(λ[sub 0](ΔkT))/ΔkT [where C(λ[sub 0](ΔkT)) is the transmission capacity of a classical binary channel, Δk is the transmission band width, 1/T is the transmission frequency of quantum states, and λ[sub 0] is the maximum eigenvalue of a certain integral equation]. © 2002 MAIK “Nauka / Interperiodica”.
- Subjects
CRYPTOGRAPHY; QUANTUM field theory
- Publication
JETP Letters, 2002, Vol 75, Issue 10, p521
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1497881