Laser Physics

, Volume 16, Issue 7, pp 1140–1144

Preparation of bell states with controlled white noise

  • A. Ling
  • P. Y. Han
  • A. Lamas-Linares
  • C. Kurtsiefer
Quntum Information and Quantum Computation
  • 42 Downloads

Abstract

We report two methods for producing Bell States with an arbitrary amount of white noise. White noise in this context refers to controlled admixtures of unpolarized light. Our methods differ from previous experiments in that we use the minimum necessary elements for generating a Bell state by c-w spontaneous parametric down conversion. We also investigated the spectral properties of a mixed state and show that one of our methods introduces irreversible noise into the Bell state, making a permanent mixed state.

PACS numbers

03.65.-w 03.67.-a 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    M. A. Nielsen and I. L. Chuang, Quantum Computation and Quantum Communication (Cambridge Univ. Press, London, 2002).Google Scholar
  2. 2.
    A. Einstein, B. Podolsky, and N. Rosen, Phys. Rev. 47, 777 (1935).CrossRefADSGoogle Scholar
  3. 3.
    A. K. Ekert, Phys. Rev. Lett. 67, 663 (1991).MATHCrossRefADSMathSciNetGoogle Scholar
  4. 4.
    R. Werner, Phys. Rev. A 40, 4227 (1989).CrossRefADSGoogle Scholar
  5. 5.
    A. White, D. James, W. Munro, and P. Kwiat, Phys. Rev. A 65, 012301 (2001).Google Scholar
  6. 6.
    Y.-S. Zhang, Y.-F. Huan, C.-F. Li, and G.-C. Guo, Phys. Rev. A 66, 062315 (2002).Google Scholar
  7. 7.
    M. Barbieri, F. D. Martini, G. D. Nepi, and P. Mataloni, Phys. Rev. Lett. 92, 177901 (2004).Google Scholar
  8. 8.
    M. Gavenda, A. Cernoch, J. Soubusta, M. Dusek, and R. Filip, Mod. Phys. Lett. B 19(5), 195 (2005).CrossRefADSMathSciNetGoogle Scholar
  9. 9.
    Y.-H. Kim and W. P. Grice, J. Mod. Opt. 49(14/15), 2309 (2002).CrossRefADSGoogle Scholar
  10. 10.
    P. Kwiat, K. Mattle, H. Weinfurter, and A. Zeilinger, Phys. Rev. Lett. 75, 4337 (1995).CrossRefADSGoogle Scholar
  11. 11.
    U. Leonhardt, Measuring the Quantum State of Light (Cambridge Univ. Press, Cambridge, 1997).Google Scholar
  12. 12.
    D. F. James, P. G. Kwiat, W. J. Munro, and A. G. White, Phys. Rev. A 64, 052312 (2001).Google Scholar
  13. 13.
    W. P. Grice and I. Walmsley, Phys. Rev. A 56, 021627 (1997).Google Scholar
  14. 14.
    Y.-H. Kim and W. P. Grice, Opt. Lett. 30, 908 (2005).CrossRefADSGoogle Scholar

Copyright information

© MAIK “Nauka/Interperiodica” 2006

Authors and Affiliations

  • A. Ling
    • 1
  • P. Y. Han
    • 1
  • A. Lamas-Linares
    • 1
  • C. Kurtsiefer
    • 1
  1. 1.Department of PhysicsNational University of SingaporeSingapore

Personalised recommendations