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Thermal entanglement of a two-qubit Heisenberg chain in presence of theDzyaloshinski-Moriya (DM) anisotropic antisymmetric interaction andentanglement teleportation when using two independent Heisenberg chains asquantum channel are investigated. It is found that the DM interaction canexcite the entanglement and teleportation fidelity. The output entanglementincreases linearly with increasing value of input one, its dependences on thetemperature, DM interaction and spin coupling constant are given in detail.Entanglement teleportation will be better realized via antiferromagnetic spinchain when the DM interaction is turned off and the temperature is low.However, the introduction of DM interaction can cause the ferromagnetic spinchain to be a better quantum channel for teleportation. A minimal entanglementof the thermal state in the model is needed to realize the entanglementteleportation regardless of antiferromagnetic or ferromagnetic spin chains.Comment: 1 tex;5eps. accepted by Physical Review

Linear optical implementation of the two-qubit controlled phase gate with conventional photon detectors