Solving the Eliashberg equations by means of N-point Padé approximants

摘要: We study the use ofN-point Pade approximants to analytically continue complex frequency Green's function from Matsubara points real axis. The method is applied solutions of Eliashberg equations and are compared with tabulated results. overall agreement good. further show that can serve make imaginary calculations consistent by fixing pseudopotential μ* energy gap Δ o .