摘要
The thermal entanglement in the spin-S Heisenberg XYZ model is studied in detail by using the entanglement measure of negativity. The effects of spin on the thermal entanglement, the threshold temperature, the critical uniform external magnetic field, the nonuniform external magnetic field and the＇, entanglement extremum are discussed, respectively. It is shown that with increasing spin, the entanglement will increase, and then decrease slowly. In addition, we find that entanglement will approach a constant Nc with the increase of DM interaction, the constant increases with the increase of spin, and both the threshold temperature Tc and critical uniform external magnetic field Bc will increase with the increasing spin. Thus high-spin system can inhibit the influence of the external environment better.
The thermal entanglement in the spin-S Heisenberg XYZ model is studied in detail by using the entanglement measure of negativity. The effects of spin on the thermal entanglement, the threshold temperature, the critical uniform external magnetic field, the nonuniform external magnetic field and the＇, entanglement extremum are discussed, respectively. It is shown that with increasing spin, the entanglement will increase, and then decrease slowly. In addition, we find that entanglement will approach a constant Nc with the increase of DM interaction, the constant increases with the increase of spin, and both the threshold temperature Tc and critical uniform external magnetic field Bc will increase with the increasing spin. Thus high-spin system can inhibit the influence of the external environment better.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 11274010, 11204061, 11374085, 11104057, and 11204002, the Anhui Provincial Natural Science Foundation under Grant Nos 11040606M16 and 1408085MA16, the China Postdoctoral Science Foundation under Grant No 20110490825, the Key Project of Chinese Ministry of Education under Grant Nos 210092 and 211080, the Key Program of the Education Department of Anhui Province under Grant Nos KJ2012A244, KJ2011A243 and KJ2012A020, the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20113401110002, the ＇211＇ Project of Anhui University, and the Personnel Department of Anhui Province.
