title: Four-photon interference with asymmetric beam splitters.
abstract: Two experiments of four-photon interference are performed with two pairs of photons from parametric downconversion with the help of asymmetric beam splitters. The first experiment is a generalization of the Hong-Ou-Mandel interference effect to two pairs of photons while the second one utilizes this effect to demonstrate a four-photon de Broglie wavelength of lambda/4 by projection measurement.
authors: Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, China.
authors: B H
authors: BH
authors: Liu
authors: F W
authors: FW
authors: Sun
authors: Y X
authors: YX
authors: Gong
authors: Y F
authors: YF
authors: Huang
authors: G C
authors: GC
authors: Guo
authors: Z Y
authors: ZY
authors: Ou