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Demonstrating various quantum effects with two entangled laser beams

  • Quantum Optics
  • Regular Article
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Abstract

We report on the preparation of entangled two mode squeezed states of yet unseen quality. Based on a measurement of the covariance matrix we found a violation of the Reid and Drummond EPR-criterion at a value of only 0.36 ± 0.03 compared to the threshold of 1. Furthermore, quantum state tomography was used to extract a single photon Fock state solely based on homodyne detection, demonstrating the strong quantum features of this pair of laser-beams. The probability for a single photon in this ensemble measurement exceeded 2/3.

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Authors and Affiliations

  1. ARC Centre of Excellence for Quantum-Atom Optics, Department of Quantum Science, The Australian National University, Canberra, Australian Capital Territory, 0200, Australia

    B. Hage, J. Janoušek, S. Armstrong, P. K. Lam & H. A. Bachor

  2. Centre for Quantum Computation and Communication Technology, Department of Quantum Science, The Australian National University, Canberra, Australian Capital Territory, 0200, Australia

    B. Hage, J. Janoušek, S. Armstrong, T. Symul, J. Bernu, H. M. Chrzanowski & P. K. Lam

Authors
  1. B. Hage
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  2. J. Janoušek
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  3. S. Armstrong
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  4. T. Symul
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  5. J. Bernu
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  6. H. M. Chrzanowski
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  7. P. K. Lam
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  8. H. A. Bachor
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Correspondence to B. Hage.

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Hage, B., Janoušek, J., Armstrong, S. et al. Demonstrating various quantum effects with two entangled laser beams. Eur. Phys. J. D 63, 457–461 (2011). https://doi.org/10.1140/epjd/e2011-20153-9

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  • DOI: https://doi.org/10.1140/epjd/e2011-20153-9

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