论文标题
由于现场排斥力波动而导致的哈伯德模型中的电子配对
Electron pairing in the Hubbard model as a result of on-site repulsion fluctuations
论文作者
论文摘要
我们将定量分析重点放在半填充哈伯德模型中绝缘体状态的稳定性上。考虑到现场库仑排斥的大规模波动（较长的松弛时间），我们考虑实现稳定状态的可能性，其特征是电子配对。配对机制如下：由于现场排斥电子的波动，如激发状态，形成了电子对。计算了现场库仑排斥及其波动的裸露值（具有电子配对的状态的状态）的裸值是稳定的。提出的配对机制在一定程度上类似于狼模型中局部力矩的形成。对链，方形和立方晶格进行了计算。
We focus our quantitative analysis on the stability of the insulator state in the Hubbard model at a half-filling. Taking into account large-scale fluctuations (with a long relaxation time) of the on-site Coulomb repulsion, we consider the possibility of realizing a stabile state which is characterized by pairing for electrons. The pairing mechanism is as follows: due to fluctuations of on-site repulsion of electrons, holes, as excited states, are formed electron pairs. The bare values of on-site Coulomb repulsion and its fluctuations, for which the states with electron pairing are stable, are calculated. The proposed pairing mechanism is to some extent similar to the formation of a localized moment in the Wolf model. The calculations were performed for the chain, as well as square and cubic lattices.
