In the third chapter, we discussed the relation between the Bogoliubov-Valatin transformation and the algebraic method based upon the BCS model Hamiltonian at first.

• 第三章我们首先使用Bogoliubov-Valatin变换对角化和新的代数对角化两种方法，将BCS模型的哈密顿量对角化，并对两种对角化方法作了比较、讨论；