ENTANGLEMENT DYNAMICS MODULATED BY COUPLING STRENGTH IN CAVITY QED
Zhong‐Xiao Man, SU FANG, Yun‐Jie Xia · International Journal of Quantum Information · 2008
We study the dynamics of entanglement for a four-qubit system in cavity QED. Two initially entangled atoms A and B are coupled respectively with spatially separate cavities a and b with coupling strengths gA and gB. We show that when gA ≠ gB, the entanglement will oscillate in the period of entanglement sudden death (ESD) for gA = gB, and the oscillation times are related to the ratios between gA and gB. Also, we show that the coupling strengths have the same effects on the entanglement evolution and energy transfer.