Open AccessINFLUENCE OF ANISOTROPY AND MAGNETIC FIELD ON THERMAL ENTANGLEMENT IN HEISENBERG MODEL AND THERMODYNAMIC ANALYSIS OF MODEL
Author(s) -
M. Pantić,
Nemanja Mićić,
Milica Pavkov Hrvojević,
Slobodan Radošević,
Petar Mali
Publication year - 2017
Publication title -
contemporary materials
Language(s) - English
Resource type - Journals
eISSN - 1986-8677
pISSN - 1986-8669
DOI - 10.7251/comen1702137p
Subject(s) - concurrence , quantum entanglement , anisotropy , heisenberg model , physics , thermal , measure (data warehouse) , qubit , condensed matter physics , magnetic field , field (mathematics) , quantum mechanics , thermodynamics , quantum , mathematics , ferromagnetism , database , computer science , pure mathematics
The thermal entanglement in a two-qubit anisotropic Heisenberg XXZ system, also XYZ system, with Dzyaloshinskii-Moriya (DM) couplings in an inhomogenous magnetic field, was studied. The effects of these two kinds of anisotropies on the thermal entanglement have been studied in detail in the concept for concurrence, the measure of entanglement. The analytical expressions of concurrence are obtained for this model. It is found that the DM interaction can enhance thermal entanglement and can be efficiently controlled by the DM interaction parameter and ehchange interaction Jx, Jy and Jz. When D is large enough, the entanglement can exist for larger temperatures and strong magnetic field. We also analysed thermodynamic properties of Heisenberg model and the most important results were shown in the paper.