Scheme for Teleportation of Unknown Entangled Atomic States via Cavity Decay

We present a physical scheme to teleportan unknown atomic entangled state via cavity decay. In the teleportationprocess, four-particle Greenberger-Horne-Zeilinger (GHZ) state is used asquantum channel, and two unknown entangled atoms and two of four atoms inthe four-particle GHZ state are trapped in four leaky cavities, respectively. Based on the joint detection of the photons leak out from the four cavities, we can teleport an unknown entangled state to two otherremote atoms with certain probability and high fidelity.