Thermal Entanglement in a Two-Qutrit Spin-1 Anisotropic Heisenberg Model

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（2）
• 页码范围: 43-46
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/2/020306

摘要

The negativity (N) as a measure of thermal entanglement (TE) is studied for a two-qutrit spin-1 anisotropic Heisenberg XXZ chain with Dzyaloshinskii-Moriya (DM) interaction in an inhomogeneous magnetic field in detail.The effects of the DM interaction parameter Dz on the thermal variation of the N for given values of the external magnetic Reid B, a parameter b which controls the inhomogeneity of B and the bilinear interaction parameters Jx = Jy ≠ Jz are obtained.It is found that N persists to higher values and to higher temperatures for the higher values of ±DZ and for the higher positive values of Jz, i.e.in the antiferromagnetic (AFM) case.When Jz < 0, the ferromagnetic (FM) case, and Dz is small, and if Jz is strong enough to compete with Dz, N decreases.In addition, N declines with the increasing values of B and b.