Correlation Functions and Multipartite Entanglement in Cavity QED
Perry R. Rice, James Clemens, Luis A. Orozco, R. Olson, D. G. Norris, Jietai Jing · 2007
We consider the entanglement between a multi-level atom and two cavity modes for a cavity QED system, find that cross-correlations between the two modes are witness to atom-field entanglement. Concurrences and log negativities are also calculated.