Thermal quantum entanglement and local quantum uncertainty of the two-qubit Heisenberg XYZ spin chain system
The influences of thermal equilibrium temperature,spins exchange interaction,Dzyaloshinskii-Moriya(DM)interaction and z-component external inhomogeneous magnetic fields on the thermal quantum en-tanglement and local quantum uncertainty of the two-qubit Heisenberg XYZ spin chain system have been inves-tigated.We have made a comparative analysis of thermal quantum entanglement and local quantum uncertainty for characterizing the quantum correlations of two-qubit Heisenberg XYZ spin chain system.The results show that the variations of thermal equilibrium temperature,DM interaction and anisotropic parameter of inhomoge-neous magnetic fields can lead to sudden death and birth of quantum entanglement.While these phenomena can-not appear for the quantum correlations characterized by local quantum uncertainty.Meanwhile,there are vast differences of thermal quantum entanglement and local quantum uncertainty at the smaller strengths of spins ex-change interaction,DM interaction and external magnetic fields.
Local quantum uncertaintyThermal entanglementXYZ spin chainDM interaction
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维普
