Demonstrating various quantum effects with two entangled laser beams

Details Demonstrating various quantum effects with two entangled laser beams Demonstrating various quantum effects with two entangled laser beams

2011-03-22

arxiv.org/abs/1103.4199v3

Physics

Quantum Physics

Scientific paper

10.1140/epjd/e2011-20153-9

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\pm0.03 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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