Abstract
We propose a deterministic polarization entanglement purification protocol (EPP) towards four-photon Cluster state, resorting to linear optic technology and multiple degrees of freedom (DOF). All of the participants can jointedly distill the maximally entangled states from the mixed states after transmission through a noisy channel with success probability 100 % in principle. The proposed protocol can be employed for the purification of any other multi-partite maximally entangled states, such as the Greenberger-Horne-Zeilinger (GHZ) state and W state, which is actually an universally feasible entanglement purification scheme towards multi-photon entanglement system.
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