重整化

• In the fifth chapter , we present the t - j model that is an important model in the system of strongly correlated electron and high temperature superconductivity at first . then , by using the ren ormalization group method , we investigate the t - j model and obtain the elementary excitation energy spectrum of it
  在第五章中首先介绍了强关联电子和高tc超导的理论的一个重要模型即t - j模型，然后采用重整化群流方程方法研究t - j模型，导出出t - j模型的流方程，再由流方程求解出t - j模型的元激发能谱。