Time-ordering dependence of measurements in teleportation

  • Reinhold A. BertlmannEmail author
  • Heide Narnhofer
  • Walter Thirring
Regular Article


We trace back the phenomenon of “delayed-choice entanglement swapping” as it was realized in a recent experiment to the commutativity of the projection operators that are involved in the corresponding measurement process. We also propose an experimental set-up which depends on the order of successive measurements corresponding to noncommutative projection operators. In this case entanglement swapping is used to teleport a quantum state from Alice to Bob, where Bob has now the possibility to examine the noncommutativity within the quantum history.


Quantum Information 


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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Reinhold A. Bertlmann
    • 1
    Email author
  • Heide Narnhofer
    • 1
  • Walter Thirring
    • 1
  1. 1.Faculty of PhysicsUniversity of ViennaViennaAustria

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