摘要
Quantum discord, as a kind of measurement of quantum correlation, has received much attention since it was introduced. This paper focuses on studying quantum discord in three-spin XXZ chain with three-spin interaction. The effects of all kinds of pa- rameters on quantum discord in the ferromagnetic region J=-I are studied. The three-spin interaction may increase the value of quantum discord between two spins, while the anisotropy may decrease the value. In addition, the regrowth of quantum discord with temperature is found in the model. For zero temperature, quantum phase transition is existent.
Quantum discord,as a kind of measurement of quantum correlation,has received much attention since it was introduced.This paper focuses on studying quantum discord in three-spin XXZ chain with three-spin interaction.The effects of all kinds of parameters on quantum discord in the ferromagnetic region J= 1 are studied.The three-spin interaction may increase the value of quantum discord between two spins,while the anisotropy may decrease the value.In addition,the regrowth of quantum discord with temperature is found in the model.For zero temperature,quantum phase transition is existent.
基金
supported by the ‘211’ Innovative Talents Cultivation Project of Inner Mongolia University
the National Natural Science Foundation of China (Grant No. 10847005)
the Inner Mongolia Talent Development Foundation and Chinese Universities Scientific Fund (Grant No.BUPT2011RC0706)
