Two Slit Experiment with Down Converted Beams

  • Jaroslav Řeháček
  • Jan Peřina
Conference paper


An interesting experiment, has been performed1 using downconverted beams in a two-slit arrangement. In this experiment a “nonlocal” quantum effect was demonstrated giving the possibility to control the degree of visibility of Young’s fringes behind two-slit screen in signal beam by means of the diameter of a pinhole in front of idler detector, when coincidence measurement scheme is applied.


Wave Vector Pump Wave Signal Beam Idler Wave Idle Beam 
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  1. 1.
    P.H.S. Ribeiro, S. Padua, J.C. Machado da Silva, and G. A. Barbosa, Controlling the degree of visibility of Young’s fringes with photon coincidence measurements, Phys.Rev.A 49: 4176 (1994).Google Scholar
  2. 2.
    J. RehaCek, J. Penna., Two slit coincidences with downconverted light, Acta Phys.Slov. 45: 399 (1995).Google Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Jaroslav Řeháček
    • 1
  • Jan Peřina
    • 1
  1. 1.Department of OpticsPalacký UniversityOlomoucCzech Republic

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