Quantum phase transition and entanglement in the transverse-field Ising model
Quantum phase transition and entanglement in the transverse-field Ising model
复制标题
横向场伊辛模型中的量子相变和纠缠
DOI:
10.1142/s0219749906002122
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发表时间:
2006-08
影响因子:
1.2
通讯作者:
Cao, Junpeng
中科院分区:
文献类型:
--
作者:
Wang, Yupeng;Wang, X. R.;Xiong, Gang;Cao, Junpeng
We present an exact calculation of the global entanglement for the ground state of the transverse-field Ising model. We obtain the analytical expressions for the correlation functions, concurrence and the global entanglement of the system for arbitrary number of particles in the ground state. We prove that the inflexion of the global entanglement exactly corresponds to the quantum phase transition point of the system.
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