Applied Physics B

, 122:117 | Cite as

Unambiguous atomic Bell measurement assisted by multiphoton states

  • Juan Mauricio TorresEmail author
  • József Zsolt Bernád
  • Gernot Alber
Part of the following topical collections:
  1. Quantum Repeaters: From Components to Strategies


We propose and theoretically investigate an unambiguous Bell measurement of atomic qubits assisted by multiphoton states. The atoms interact resonantly with the electromagnetic field inside two spatially separated optical cavities in a Ramsey-type interaction sequence. The qubit states are postselected by measuring the photonic states inside the resonators. We show that if one is able to project the photonic field onto two coherent states on opposite sites of phase space, an unambiguous Bell measurement can be implemented. Thus, our proposal may provide a core element for future components of quantum information technology such as a quantum repeater based on coherent multiphoton states, atomic qubits and matter–field interaction.


Coherent State Success Probability Wigner Function Photon Number Bell State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work is supported by the BMBF project


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Juan Mauricio Torres
    • 1
    Email author
  • József Zsolt Bernád
    • 1
  • Gernot Alber
    • 1
  1. 1.Institut für Angewandte PhysikTechnische Universität DarmstadtDarmstadtGermany

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