Entanglement and teleportation through a two-qubit Heisenberg XXZ model with the Dzyaloshinskii-Moriya interaction
School of physics and optoelectronic technology, Dalian University of Technology, Dalian 116024, P.R. China
Corresponding author: firstname.lastname@example.org
Revised: 27 July 2009
Published online: 19 September 2009
We study the thermal entanglement in the two-qubit Heisenberg XXZ model with the Dzyaloshinskii-Moriya (DM) interaction, and teleport an unknown state using the model in thermal equilibrium state as a quantum channel. The effects of DM interaction, including Dx and Dz interaction, the anisotropy and temperature on the entanglement and fully entangled fraction are considered. What deserves mentioning here is that for the antiferromagnetic case, the Dx interaction can be more helpful for increasing the entanglement and critical temperature than Dz, but this cannot for teleportation.
PACS: 03.65.Ud – Entanglement and quantum nonlocality / 03.67.Mn – Entanglement measures, witnesses, and other characterizations / 75.10.Jm – Quantized spin models
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009