Cross-correlations and entanglement in a cavity QED system
M. L. Terraciano, R. Olson, D. G. Norris, Jietai Jing, Luis A. Orozco, James Clemens, Perry R. Rice · 2007
We measure the cross-correlation between transmitted light out of a cavity QED system and spontaneous emission into the orthogonal polarization cavity mode. The result is an entanglement witness between the two modes of the cavity.