Quantum teleportation via a two-qubit HeisenbergXYchain—effects of anisotropy and magnetic field
Ye Yeo, Tongqi Liu, Yu-En Lu, Qi-Zhong Yang · Journal of Physics A Mathematical and General · 2005
In this paper we study the influence of anisotropy on the usefulness of the entanglement in a two-qubit Heisenberg XY chain at thermal equilibrium in the presence of an external magnetic field, as a resource for quantum teleportation via the standard teleportation protocol. We show that the nonzero thermal entanglement produced by adjusting the external magnetic field beyond some critical strength is a useful resource. We also consider entanglement teleportation via two two-qubit Heisenberg XY chains.