Instanton method for the electron propagator
介观与纳米尺度物理
2009-11-07 v1 强关联电子
摘要
A nonperturbative theory of the electron propagator is developed and used to calculate the one-particle Green's function and tunneling density-of-states in strongly correlated electron systems. The method, which is based on a Hubbard-Stratonovich decoupling of the electron-electron interaction combined with a cumulant expansion of the resulting noninteracting propagator, provides a possible generalization of the instanton technique to the calculation of the electron propagator in a many-body system. Application to the one-dimensional electron gas with short-range interaction is discussed.
引用
@article{arxiv.cond-mat/0105172,
title = {Instanton method for the electron propagator},
author = {Michael R. Geller},
journal= {arXiv preprint arXiv:cond-mat/0105172},
year = {2009}
}
备注
EP2DS conference proceeding