Entangled-photon quantum cryptography

Paul G. Kwiat, Andrew G. White, C. Glen Peterson, Devang S. Naik, Andrew J. Berglund

Research output: Contribution to conferencePaper

Abstract

Ekert's proposal for quantum cryptography states that, each photon of a quantum-mechanically entangled pairs is sent to the sender and receiver, who randomly measure the polarization in various bases. Using the polarization-entangled photon pairs from a novel spontaneous parametric down-conversion source, Ekert's proposal was experimentally implemented. Liquid crystals were used to randomly measure each photon in one of four bases. As a result, several eavesdropping strategies, including strong measurements of the polarization, and also 'quantum nondemolition' (QND) measurements, were clarified.

Original languageEnglish (US)
Number of pages1
StatePublished - Dec 1 2000
Externally publishedYes
EventQuantum Electronics and Laser Science Conference (QELS 2000) - San Francisco, CA, USA
Duration: May 7 2000May 12 2000

Other

OtherQuantum Electronics and Laser Science Conference (QELS 2000)
CitySan Francisco, CA, USA
Period5/7/005/12/00

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Kwiat, P. G., White, A. G., Peterson, C. G., Naik, D. S., & Berglund, A. J. (2000). Entangled-photon quantum cryptography. Paper presented at Quantum Electronics and Laser Science Conference (QELS 2000), San Francisco, CA, USA, .