Entangled-photon quantum cryptography

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

Research output: Contribution to conferencePaperpeer-review


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 - 2000
Externally publishedYes
EventQuantum Electronics and Laser Science Conference (QELS 2000) - San Francisco, CA, USA
Duration: May 7 2000May 12 2000


OtherQuantum Electronics and Laser Science Conference (QELS 2000)
CitySan Francisco, CA, USA

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Entangled-photon quantum cryptography'. Together they form a unique fingerprint.

Cite this