The Entanglement in Anisotropic Heisenberg XYZ Chain with inhomogeneous magnetic field

摘要

The thermal entanglement of a two-qubit anisotropic Heisenberg $XYZ$ chainunder an inhomogeneous magnetic field b is studied. It is shown that wheninhomogeneity is increased to certain value, the entanglement can exhibit alarger revival than that of less values of b. The property is both true forzero temperature and a finite temperature. The results also show that theentanglement and critical temperature can be increased by increasinginhomogeneous exteral magnetic field.