Effect of different Dzyaloshinskii-Moriya interactions on entanglement in the Heisenberg XYZ chain

In this paper, we study the thermal entanglement in a two-qubit Heisenberg XYZ system with different Dzyaloshinskii-Moriya (DM) couplings. We show that different DM coupling parameters have different influences on the entanglement and the critical temperature. In addition, we find that when $J_i$ ($i$-component spin coupling interaction) is the largest spin coupling coefficient, $D_i$ ($i$-component DM interaction) is the most efficient DM control parameter, which can be obtained by adjusting the direction of DM interaction.