CONSERVING APPROXIMATIONS FOR STRONGLY CORRELATED ELECTRON-SYSTEMS - BETHE-SALPETER-EQUATION AND DYNAMICS FOR THE TWO-DIMENSIONAL HUBBARD-MODEL
CONSERVING APPROXIMATIONS FOR STRONGLY CORRELATED ELECTRON-SYSTEMS - BETHE-SALPETER-EQUATION AND DYNAMICS FOR THE TWO-DIMENSIONAL HUBBARD-MODEL
复制标题
DOI：
10.1103/physrevlett.62.961
复制
发表时间：
1989-02-20
影响因子：
8.6
通讯作者：
WHITE, SR
中科院分区：
文献类型：
--
作者：
BICKERS, NE;SCALAPINO, DJ;WHITE, SR
在这封信中，我们描述了一种研究相互作用电子系统相变和动力学的新技术。该方法是基于无限阶守恒近似的推导和自洽解。它为研究具有强频率和动量依赖性的两粒子相关提供了一种新的方法。我们利用这种技术推导出二维Hubbard模型的低温相图和动态相关函数。
In this Letter we describe a new technique for investigating phase transitions and dynamics in interacting electron systems. This technique is based on the derivation and self-consistent solution of infinite-order conserving approximations. It provides a new approach to the study of two-particle correlations with strong frequency and momentum dependence. We use this technique to derive a low-temperature phase diagram and dynamic correlation functions for the two-dimensional Hubbard model.