Time-ordering dependence of measurements in teleportation
University of Vienna, Faculty of Physics,
a e-mail: Reinhold.Bertlmann@univie.ac.at
Received in final form: 28 January 2013
Published online: 21 March 2013
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.
Key words: Quantum Information
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2013