Remote atom entanglement in a fibre-connected three-atom system

An Ising-type atom--atom interaction is obtained in a fibre-connected three-atom system. The interaction is effective when \varDelta\approx \gamma_0\gg g. The preparations of remote two-atom and three-atom entanglements governed by this interaction are discussed in a specific parameter region. The overall two-atom entanglement is very small because of the existence of the third atom. However, the three-atom entanglement can reach a maximum very close to 1.