论文标题
一维离子哈伯德模型中的相变
Phase transitions in the one-dimensional ionic Hubbard model
论文作者
论文摘要
我们通过测量一维离子哈伯德模型中的键能，数量密度和半链纠缠熵来研究量子相变。通过使用基质产品运算符执行无限密度基质重新归一化组，我们将基态作为基质产品状态的规范形式。根据化学电位和交错电势，数量密度和半链纠缠熵显示出莫特过渡的明显特征。我们的结果证实了矩阵产品运营商方法在研究巡回效率系统中的成功。
We study quantum phase transitions by measuring the bond energy, the number density, and the half-chain entanglement entropy in the one-dimensional ionic Hubbard model. By performing the infinite density matrix renormalization group with matrix product operator, we obtain ground states as the canonical form of matrix product states. Depending on the chemical potential and the staggered potential, the number density and the half-chain entanglement entropy shows clear signatures of the Mott transition. Our results confirm the success of the matrix product operator method for investigation of itinerant fermion systems.
