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Quantum cryptography based on interaction-free measurement

✍ Scribed by Guang-Can Guo; Bao-Sen Shi

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
47 KB
Volume
256
Category
Article
ISSN
0375-9601

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✦ Synopsis

We present a new quantum key distribution model based on interaction-free measurement. The security against two interceptrresend eavesdropping strategies in ideal channel and device is shown. This scheme is easily implementable in current experiments.

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We examine several proposed schemes by Franson et al. for quantum logic gates based on non-local exchange interactions between two photons in a medium. In these schemes the presence of a single photon in a given mode is supposed to induce a large phase shift on another photon propagating in the same