Fig. 1. Schematic of physical model

Fig. 2. Entanglement between cavities c 1 and c 2 versus interaction time for different coupling constants J1 when k1 =0.2, k2 =0. (a) Larger J1 ; (b) smaller J1

Fig. 3. Entanglement between cavities versus interaction time for different coupling constants J1 . (a) Entanglement between cavities c 1 and c 3 when k1 = k2 ≠0; (b) entanglement between cavities c 1 and c 3 when k1 = k2 =0.1; (c) entang

Fig. 4. Entanglement between cavities c i and c j ( i , j =1, 2, 3; i ≠ j ) versus interaction time for different coupling constants J1 . (a) Entanglement between cavities c 1 and c 3 when k1 =