We propose two schemes for teleporting an unknown state. In our schemes, a three-particle Greenberger-Horne-Zeilinger state is used as a quantum channel. We show that the probabilistic teleportation of an unknown quantum state can be realized.
In this paper, two schemes for teleporting an unknown three-particle three-level entangled state are proposed. In the first scheme, two partial three-particle three-level entangled states are used as the quantum channels, while in the second scheme, three two-particle three-level non-maximally entangled states are employed as quantum channels. It is shown that the teleportation can be successfully realized with certain probability, for both two schemes, if a receiver adopts some appropriate unitary transformations. It is shown also that the successful probabilities of these two schemes are different.