An applicable and resource-economical scheme for the teleportation of W state via spin-path entangled quantum channel

In this paper, we accomplish the teleportation of an unknown three-particle maximally entangled $W$ state by using a spin-path entangled quantum channel which may be realized experimentally based on the advanced theory and technique in Bose--Einstein condensate (BEC) of molecule, micro-fabricated wave guide and simple quantum logic gate. Similarly, we can make an arbitrary $n$-particle entangled Greenberger--Horne--Zeilinger (GHZ) state ($n\ge 4$) teleported through this kind of quantum channel. It may have important applications due to its resource-economic and practical features.