外加磁场下具有Dzyaloshinski-Moriya相互作用的三量子位Heisenberg XX链的热量子失协

Thermal Quantum Discord in a Three-qubit Heisenberg XX Model with Dzyaloshinski-Moriya Interaction under External Magnetic Field

该文研究了外加磁场下具有Dzyaloshinski-Moriya(DM)各向异性反对称相互作用的三量子位Heisenberg XX链的对热量子失协。详细地给出了磁场、DM相互作用及温度对热量子失协的影响。结果表明:热量子失协随着温度和磁场的增加而减少;DM相互作用可以有效地调控热量子失协。

Thermal pairwise quantum discord of a three-qubit Heisenberg XX chain with the Dzyaloshinski Moriya （DM） anisotropic antisymmetric interaction under an external magnetic field is investigated. The thermal quantum discord dependence on the DM interaction, magnetic field and temperature are given in detail. The results show that the thermal quantum discord can be controlled by DM interaction. The thermal quantum discord decreases with the increase of temperature and magnetic field.