Theory of interacting Fermi systems

A classic from 1964, this monograph, translated from the original French, provides a detailed exposition of field theoretical methods as applied to zero-temperature Fermi liquids. The machinery of diagrammatic techniques is explained in detail, both for the ground state and for the Green's functions (propagators) that describe elementary excitations. Special attention is paid to the concept of quasiparticles in normal Fermi liquids, in continuity with those of the noninteracting gas. The phenomenological theory of Landau is justified from first principles. The extension of perturbation methods to superfluid systems is discussed in the last chapter. The book emphasizes methods and concepts more than specific applications: It is aimed at graduate students and at condensed matter physicists.