Thermal quantum correlation and quantum phase transition in Ising-XXZ diamond chain

• 作 者: Kun Gao Xiang-Mu Kong
• 机 构: CollegeofPhysicsandEngineering,QufuNormalUniversity,Qufu273165,China
• 出 处: 第二届全国统计物理与复杂系统学术会议暨第七届海峡两岸统计物理研讨会
• 发表日期: 2013年7期
• 关键词: Thermal quantum discord Quantum phase transition Ising-XXZ model Transfer-matrix

　　The one-dimensional infinite diamond chain consisted of quantum Heisenberg dimers alternating with single classical Ising spins is considered.By using the transfer-matrix method, the quantum discord (QD) between the two Heisenberg spins of the dimer can be exactly obtained.The finite-temperature properties are investigated compared with entanglement of formation (EOF) and shown that QD can exist in a wider parameter space than EOF.