Quantum Impurity Models with Coupled Cluster Method

• 来源期刊: 理论物理通讯(英文版)
• 学科: 化学
• 关键词: 相互作用模型 耦合簇方法 杂质 量子 基态性质 格林函数 摄动理论 交互模型
• 年，卷（期）: 2010,（9）
• 所属期刊栏目: Atomic and Molecular Physics
• 页码范围: 509-517
• 页数: 9页
• 分类号: O641.12 TU435
• 语种: 英文

摘要

We investigate the ground-state properties of the Anderson single impurity model (finite Coulomb impurityrepulsion) with the Coupled Cluster Method.We consider different CCM reference states and approximation schemesand make comparison with exact Green's function results for the non-interacting model and with Brillouin-Wignerperturbation theory for the full interacting model.Our results show that coupled cluster techniques are well suited toquantum impurity problems.