Efficient Long Range Communication by Quantum Injected Optical Parametric Amplification

  • Chiara Vitelli
  • Lorenzo Toffoli
  • Fabio Sciarrino
  • Francesco De Martini
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 43)


Free-space optical communications over long distances are associated with severe losses while the natural limit for the energy associated to a single bit of information is just one photon. In order to enhance the transmission Efficiency we propose the use of macro qubits consisting of thousand of photons. We investigate the Fidelity of the transmission of a macro-qubit generated by quantum injected optical parametric amplification (QI-OPA) along a lossy communication channel. The realization of a QI-OPA micro-macro Teleportation protocol is considered.


Quantum Communication Quantum Teleportation Optical Parametric Amplifier 


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  1. 1.
    Gisin, N., Thew, R.: Quantum Communication. Nature Photonics 1, 165–167 (2007)CrossRefGoogle Scholar
  2. 2.
    Waks, E., Zeevi, A., Yamamoto, Y.: Security of quantum key distribution with entangled photons against individual attacks. Phys. Rev. A 65, 052310 (2002)CrossRefGoogle Scholar
  3. 3.
    Ursin, R., Tiefenbacher, F., Schmitt-Manderbach, T., Weier, H., Scheidl, T., Lindenthal, M., Baluensteiner, B., Jennewein, T., Perdigues, J., Trojek, P., Omer, B., Furst, M., Meyenburg, M., Rarity, J., Sodnik, Z., Barbieri, C., Weinfurter, H., Zeilinger, A.: Entanglement-based quantum communication over 144 km. Nature 3, 481–486 (2007)Google Scholar
  4. 4.
    Schmitt-Manderbach, T., Weier, H., Furst, M., Ursin, R., Tiefenbacher, F., Scheidl, T., Perdigues, J., Sodnik, Z., Kurtsiefer, K., Rarity, J., Zeilinger, A., Weinfurter, H.: Experimental Demonstration of Free-Space Decoy-State Quantum Key Distribution over 144 km. Phys. Rev. Lett. 98, 10504 (2007)CrossRefGoogle Scholar
  5. 5.
    Fedrizzi, A., Ursin, R., Herbst, T., Nespoli, M., Prevedel, R., Scheidl, T., Tiefenbacher, F., Jennewein, T., Zeilinger, A.: High-fidelity transmission of entanglement over a high-loss free-space channel. Nature Physics 5, 389–392 (2009)CrossRefGoogle Scholar
  6. 6.
    De Martini, F.: Amplification of Quantum Entanglement. Phys.Rev. Lett. 81, 2842–2845 (1998)MathSciNetCrossRefzbMATHGoogle Scholar
  7. 7.
    De Martini, F.: Quantum superposition of parametrically amplified multiphoton pure states. Phys. Lett. A 250, 15–19 (1998)CrossRefGoogle Scholar
  8. 8.
    De Martini, F., Sciarrino, F., Vitelli, C.: Entanglement Test on a Microscopic-Macroscopic System. Phys. Rev.Lett. 100, 253601 (2008)CrossRefGoogle Scholar
  9. 9.
    De Martini, F., Sciarrino, F., Spagnolo, N.: Anomalous Lack of Decoherence of the Macroscopic Quantum Superpositions Based on Phase-Covariant Quantum Cloning. Phys. Rev. Lett. 103, 100501 (2009)CrossRefGoogle Scholar
  10. 10.
    Lombardi, E., Sciarrino, F., Popescu, S., De Martini, F.: Teleportation of a Vacuum–One-Photon Qubit. Phys. Rev. Lett. 88, 070402 (2002)CrossRefGoogle Scholar
  11. 11.
    Bennet, C.H., Brassard, G., Crpeau, C., Jozsa, R., Peres, A., Wootters, W.K.: Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels. Phys. Rev. Lett. 70, 1895 (1993)MathSciNetCrossRefzbMATHGoogle Scholar
  12. 12.
    Nagali, E., De Angelis, T., Sciarrino, F., De Martini, F.: Experimental realization of macroscopic coherence by phase-covariant cloning of a single photon. Phys. Rev. A 76, 042126 (2007)CrossRefGoogle Scholar
  13. 13.
    Boschi, D., Branca, S., De Martini, F., Hardy, L., Popescu, S.: Experimental Realization of Teleporting an Unknown Pure Quantum State via Dual Classical and Einstein-Podolsky-Rosen Channels. Phys. Rev. Lett. 80, 1121–1125 (1998)MathSciNetCrossRefzbMATHGoogle Scholar
  14. 14.
    Massar, S., Popescu, S.: Optimal Extraction of Information from Finite Quantum Ensembles. Phys. Rev. Lett. 74, 1259–1263 (1995)MathSciNetCrossRefzbMATHGoogle Scholar

Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2010

Authors and Affiliations

  • Chiara Vitelli
    • 1
    • 2
  • Lorenzo Toffoli
    • 1
  • Fabio Sciarrino
    • 1
    • 3
  • Francesco De Martini
    • 1
    • 4
  1. 1.Dipartimento di Fisica“Sapienza” Università di RomaRomaItaly
  2. 2.Consorzio Nazionale Interuniversitario per le Scienze Fisiche della MateriaItaly
  3. 3.Istituto Nazionale di Ottica ApplicataFirenzeItaly
  4. 4.Accademia Nazionale dei LinceiRomaItaly

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