Entanglement in the anisotropic Heisenberg XYZ model with different Dzyaloshinskii-Moriya interaction and inhomogeneous magnetic field
Entanglement in the anisotropic Heisenberg XYZ model with different Dzyaloshinskii-Moriya interaction and inhomogeneous magnetic field
复制标题
具有不同 Dzyaloshinskii-Moriya 相互作用和不均匀磁场的各向异性海森堡 XYZ 模型中的纠缠
DOI：
10.1140/epjd/e2008-00208-x
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发表时间：
2008-12-01
影响因子：
1.8
通讯作者：
Cao, Z. L.
中科院分区：
文献类型：
--
作者：
Li, D. C.;Cao, Z. L.
我们研究了具有不同 Dzyaloshinskii-Moriya (DM) 相互作用和不均匀磁场的双量子位 Heisenberg XYZ 系统中的纠缠。发现控制参数（Dx、Bx和bx）与常用控制参数（Dz、Bz和bz）在纠缠和临界温度方面有显着不同，这些x分量参数可以更有效地增加纠缠和临界温度。此外，我们还展示了这些用于控制纠缠的 x 分量参数的属性。在基态下，增大Dx（自旋轨道耦合参数）可以减小临界值bxc，增大复兴区的纠缠，调整一些参数（增大bx和J，减小Bx和Δ）可以减小临界值Dxc，增大复兴区。在热状态下，增加Dx可以增加复活区和复活区中的纠缠（对于T或bx），并提高临界值Bxc使高纠缠区域更大。而且，纠缠和复活区域会随着Bx（均匀磁场）的减小而增加。另外，小bx（非均匀磁场）与Dx有一些相似的性质，并且随着bx的增加，纠缠也有复活现象，使得对于较大的bx，纠缠可以在更高的温度下存在。
We investigate the entanglement in a two-qubit Heisenberg XYZ system with different Dzyaloshinskii-Moriya (DM) interaction and inhomogeneous magnetic field. It is found that the control parameters (Dx, Bxand bx) are remarkably different with the common control parameters (Dz, Bzand bz) in the entanglement and the critical temperature, and these x-component parameters can increase the entanglement and the critical temperature more efficiently. Furthermore, we show the properties of these x-component parameters for the control of entanglement. In the ground state, increasing Dx(spin-orbit coupling parameter) can decrease the critical value bxcand increase the entanglement in the revival region, and adjusting some parameters (increasing bxand J, decreasing Bxand Δ) can decrease the critical value Dxcto enlarge the revival region. In the thermal state, increasing Dxcan increase the revival region and the entanglement in the revival region (for T or bx), and enhance the critical value Bxcto make the region of high entanglement larger. Also, the entanglement and the revival region will increase with the decrease of Bx(uniform magnetic field). In addition, small bx(nonuniform magnetic field) has some similar properties to Dx, and with the increase of bxthe entanglement also has a revival phenomenon, so that the entanglement can exist at higher temperature for larger bx.