4TH-ORDER INTERFERENCE EFFECTS AT LARGE DISTANCES

J G RARITY, P R TAPSTER

Research output: Contribution to journalArticle (Academic Journal)

Abstract

We present an experimental demonstration of a fourth-order interference effect first suggested by Franson [Phys. Rev. Lett. 62, 2205 (1989)], where pair photons are directed to two separated Mach-Zehnder interferometers. Apparent nonlocal control of the output ports in which coincident photons are detected can be demonstrated. We show that this effect is present when one of the photons has passed through 170 m of multimode optical fiber. Such a system could form the basis of an interception-proof communication system.

Original languageEnglish
Pages (from-to)2052-2056
Number of pages5
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Volume45
Issue number3
Publication statusPublished - 1 Feb 1992

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