论文标题
在蜂窝晶格上沮丧的XY模型中的量子相关性
Quantum correlations in the frustrated XY model on the honeycomb lattice
论文作者
论文摘要
我们认为旋转$ 1/2 $ XY沮丧的抗磁性Heisenberg Honecomb模型。模型的基态相图中有一个不清楚的中间区域。最知名的阶段是量子自旋 - 液体（QSL）和抗磁性ISING ORDERing。从量子相关性的角度来看，QSL相应纠缠。通过这个事实，我们通过使用数值兰斯佐斯和密度矩阵恢复归一化组（DMRG）方法计算了同意，量子不和谐（QD）和纠缠熵。我们的结果明确表明，中间区域应纠缠为支撑QSL阶段。
We consider the spin-$1/2$ XY frustrated antiferromagnetic Heisenberg honeycomb model. There is an unclear intermediate region in the ground state phase diagram of the model. The most recognized phases are the quantum spin-liquid (QSL) and the antiferromagnetic Ising ordering. From the viewpoint of the quantum correlations, the QSL phase is expected to be entangled. Motivated by this fact, we have calculated the concurrence, the quantum discord (QD), and the entanglement entropy, by using numerical Lanczos and density matrix renormalization group (DMRG) methods. Our results explicitly show that the intermediate region should be entangled supporting the QSL phase.
