Phys. Rev. Lett. 62, 2209–2212 (1989)Two-particle interferometryReceived 30 January 1989; published in the issue dated 8 May 1989 An exposition is given of the fundamental ideas of the recently opened field of two-particle interferometry, which employs spatially separated, quantum mechanically entangled two-particle states. These ideas are illustrated by a realizable arrangement, in which four beams are selected from the output of a laser-pumped down-converting crystal, with two beams interferometrically combined at one locus and two at another. When phase shifters are placed in these beams, the coincident count rates at the two loci will oscillate as the phases are varied, but the single count rates will not. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.62.2209
DOI:
10.1103/PhysRevLett.62.2209
PACS:
03.65.Bz, 42.10.Jd, 42.50.Dv, 42.50.Wm
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