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Magnetic Field Effects on Quantum Correlations for the XXX Heisenberg Spin Chain
Safa Jami,Zohreh Haqpanah 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.7
We study the geometric quantum discord (GQD) for three spin 1 2 particles in the XXX Heisenberg model with an external magnetic field. We investigate the effect of temperature and J (the strength of interaction) on the GQD. Then, we apply a uniform magnetic field to our system and study the behavior of the GQD under the field. Furthermore, we compare the behavior of the GQD to the entanglement for our system under the above parameters.
Safa Jami,Asiyeh Dehnavi 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.74 No.5
We have studied the effect of the Dzyaloshinskii Moria (DM) interaction on geometric quantum discord (GQD) and concurrence for two spin $\sfrac12$ particles in the XXZ Heisenberg model, we have also investigated the effects of the temperature, the strength of DM interaction (D) and the anisotropic coupling constant of the Heisenberg model $J_z$ on them in the GQD and concurrence. Further, we have compared the behaviors of GQD and entanglement for our system under the above parameters.