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

  title={Unsharp particle-wave duality in a photon split-beam experiment},
  author={Peter Mittelstaedt and A. Prieur and Rudolf T. Schieder},
  journal={Foundations of Physics},
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. 
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