Phys. Rev. Lett. 69, 1293–1295 (1992)Practical quantum cryptography based on two-photon interferometryReceived 30 March 1992; published in the issue dated 31 August 1992 We propose an experimental realization of 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. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.69.1293
DOI:
10.1103/PhysRevLett.69.1293
PACS:
03.65.Bz, 42.50.Wm, 89.70.+c
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