Demonstrating various quantum effects with two entangled laser beams

作者：Hage B^*; Janousek J; Armstrong S; Symul T; Bernu J; Chrzanowski H M; Lam P K; Bachor H A

来源：European Physical Journal D, 2011, 63(3): 457-461.

DOI：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 +/- 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.

• 出版日期2011-8