Quantum Cryptography

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Abstract

Quantum cryptography could well be the first application of quantum mechanics at the individual quanta level. The very fast progress in both theory and experiments over the recent years are reviewed, with emphasis on open questions and technological issues.

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Most cited references 153

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Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels

Charles Bennett, Gilles Brassard, Claude Crépeau … (1993)

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Communication Theory of Secrecy Systems*

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A quantum dot single-photon turnstile device.

P. Michler, A Kiraz, C Becher … (2000)

Quantum communication relies on the availability of light pulses with strong quantum correlations among photons. An example of such an optical source is a single-photon pulse with a vanishing probability for detecting two or more photons. Using pulsed laser excitation of a single quantum dot, a single-photon turnstile device that generates a train of single-photon pulses was demonstrated. For a spectrally isolated quantum dot, nearly 100% of the excitation pulses lead to emission of a single photon, yielding an ideal single-photon source.