PRACTICAL QUANTUM CRYPTOGRAPHY BASED ON 2-PHOTON INTERFEROMETRY

A K EKERT, J G RARITY, P R TAPSTER, G M PALMA

Research output: Contribution to journalArticle (Academic Journal)

Abstract

We propose an experimental realization of a cryptographic-key-sharing scheme exploiting quantum correlations between pair photons. Our experimental setup consists of an external source of correlated photon pairs which propagate to two widely separated unbalanced Mach-Zehnder interferometers. The probability of detection of photon pairs in any two outputs of the interferometers can be fully modulated by phase plates in either interferometer.

Original languageEnglish
Pages (from-to)1293-1295
Number of pages3
JournalPhysical Review Letters
Volume69
Issue number9
Publication statusPublished - 31 Aug 1992

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