Probabilistic Teleportation of a Three-Particle GHZ State via Two Three-ParticleEntangled W States

Abstract

A scheme for teleporting an unknown three-particle GHZ state from a senderto either one of two receivers is proposed. In this scheme, the quantumchannel is composed of two non-maximally three-particle entangled W states.An unknown three-particle GHZ state can be perfectly teleportedprobabilistically if the sender performs two generalized Bell-statemeasurements and the Hadamard operation while either one of two receiversintroduces an ancillary particle which is one of the final three particleconstituting the teleported state, then performs the controlled-notoperation with the ancillary particle as the target bit and introduces anappropriate unitary transformation with the help of the other receiver'ssimple measurements. All kinds of unitary transformations are given indetail. The present scheme may be directly generalized to teleport anunknown multiparticle GHZ state via two three-particle entangled W statesused as the quantum channel.