Subcarrier multiplexing optical quantum key distribution

Journal Article · Wed Feb 15 00:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.024305· OSTI ID:20974647

Ortigosa-Blanch, A; Capmany, J ^[1]

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1. iTEAM Research Institute, Universidad Politecnica de Valencia, Camino de Vera s/n, 46022 Valencia (Spain)

We present the physical principles of a quantum key distribution system that opens the possibility of parallel quantum key distribution and, therefore, of a substantial improvement in the bit rate of such systems. Quantum mechanics allows for multiple measurements at different frequencies and thus we exploit this concept by extending the concept of frequency coding to the case where more than one radio-frequency subcarrier is used for independently encoding the bits onto an optical carrier. Taking advantage of subcarrier multiplexing techniques we demonstrate that the bit rate can be greatly improved as parallel key distribution is enabled.

• OSTI ID: 20974647
• Journal Information: Physical Review. A, Vol. 73, Issue 2; Other Information: DOI: 10.1103/PhysRevA.73.024305; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTRIBUTION
INFORMATION THEORY
PHOTONS
QUANTUM COMPUTERS
QUANTUM CRYPTOGRAPHY
QUANTUM MECHANICS
RADIOWAVE RADIATION