Foundations of Physics

, Volume 17, Issue 9, pp 891–903 | Cite as

Unsharp particle-wave duality in a photon split-beam experiment

  • P. Mittelstaedt
  • A. Prieur
  • R. Schieder


In a quantum mechanical two-slit experiment one can observe a single photon simultaneously as particle (measuring the path) and as wave (measuring the interference pattern) if the path and the interference pattern are measured in the sense of unsharp observables. These theoretical predictions are confirmed experimentally by a photon split-beam experiment using a modified Mach—Zehnder interferometer.


Theoretical Prediction Single Photon Interference Pattern Zehnder Interferometer Unsharp Observable 
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Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • P. Mittelstaedt
    • 1
  • A. Prieur
    • 1
  • R. Schieder
    • 1
  1. 1.Physikalische Institute der Universität zu KölnKöln 41FRG

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