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Titolo:
Quantum key distribution with continuous variables
Autore:
Bencheikh, K; Symul, T; Jankovic, A; Levenson, JA;
Indirizzi:
Lab Photon & Nanostruct, CNRS, UPR 20, F-92222 Bagneux, France Lab Photon & Nanostruct Bagneux France F-92222 , F-92222 Bagneux, France
Titolo Testata:
JOURNAL OF MODERN OPTICS
fascicolo: 13, volume: 48, anno: 2001,
pagine: 1903 - 1920
SICI:
0950-0340(200111)48:13<1903:QKDWCV>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
PODOLSKY-ROSEN PARADOX; NONDEGENERATE PARAMETRIC AMPLIFICATION; ENTANGLED PHOTONS; TWIN BEAMS; CRYPTOGRAPHY; STATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Bencheikh, K Lab Photon & Nanostruct, CNRS, UPR 20, BP 29, F-92222 Bagneux, France Lab Photon & Nanostruct BP 29 Bagneux France F-92222 France
Citazione:
K. Bencheikh et al., "Quantum key distribution with continuous variables", J MOD OPT, 48(13), 2001, pp. 1903-1920

Abstract

We study a new quantum cryptography protocol with continuous variables forthe construction of secret quantum keys. The protocol is based on pairs ofEinstein-Podolsky-Rosen entangled quadratures of a two-mode electromagnetic field generated by non-degenerate parametric amplification. Instantaneousmeasurements of the quantum fluctuations provide the random bits of the secret key. The irreversible alteration of the quadrature entanglement due tounauthorized measurements immunizes the quantum key distribution against eavesdropping attacks. Based on two identical non-degenerate parametric amplifiers, the protocol circumvents the usual 50% bits rejection due to base incompatibility during the key generation process, and avoids the need for homodyne detection schemes which are highly sensitive to the mode matching problems.

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Documento generato il 07/07/20 alle ore 04:18:28