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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| Institution: | 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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