Demonstrating various quantum effects with two entangled laser beams |
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Authors: | B. Hage J. Janoušek S. Armstrong T. Symul J. Bernu H. M. Chrzanowski P. K. Lam H. A. Bachor |
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Affiliation: | 1.ARC Centre of Excellence for Quantum-Atom Optics, Department of Quantum Science,The Australian National University,Canberra,Australia;2.Centre for Quantum Computation and Communication Technology, Department of Quantum Science,The Australian National University,Canberra,Australia |
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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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