The European Physical Journal D

, Volume 61, Issue 1, pp 231–236

Entanglement preparation using symmetric multiports

Authors

    • Department of Physics, FNSPECzech Technical University in Prague
  • V. Košták
    • Department of Physics, FNSPECzech Technical University in Prague
  • I. Jex
    • Department of Physics, FNSPECzech Technical University in Prague
  • E. Andersson
    • SUPA, Department of PhysicsSchool of EPS, Heriot-Watt University
  • T. Kiss
    • Department of Quantum Optics and Quantum InformationResearch Institute for Solid State Physics and Optics, Hungarian Academy of Sciences
Article

DOI: 10.1140/epjd/e2010-10337-2

Cite this article as:
Brougham, T., Košták, V., Jex, I. et al. Eur. Phys. J. D (2011) 61: 231. doi:10.1140/epjd/e2010-10337-2

Abstract.

We investigate the entanglement produced by a multi-path interferometer that is composed of two symmetric multiports, with phase shifts applied to the output of the first multiport. Particular attention is paid to the case when we have a single photon entering the interferometer. For this situation we derive a simple condition that characterizes the types of entanglement that one can generate. We then show how one can use the results from the single-photon case to determine what kinds of multi-photon entangled states one can prepare using the interferometer.

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010