Thermal entanglement in a two-qubit HeisenbergXYchain with the Dzyaloshinskii–Moriya interaction
Meng Qin, Xu Sheng-Long, Tao Ying-Juan, D. Tian · Chinese Physics B · 2008
This paper investigates thermal entanglements of a two-qubit Heisenberg XY chain in the presence of the Dzyaloshinskii–Moriya anisotropic antisymmetric interaction. By the concept of concurrence, it is found that the effects of spin–orbit coupling on the entanglement are different from those of spin–spin model. The analytical expressions of concurrence are obtained for this model.