Entanglement between Two Tavis-Cummings Systems with N=2

We consider two non interacting two-atoms Tavis-Cummings systems and examine the entanglement among four two-state atoms. For our purpose, we assume that one atom from each system are entangled initially and we obtain time-dependent concurrence among atoms. There are six pairwise concurrences among atoms and in this paper, we focus on remote atoms. We show that initially non-entangled atoms and becomes entangled by passing time, the process which may be interpreted as entanglement transfer between the cavities.