Abstract
The general interaction between quasiparticles and particle-hole excitations in a neutral Fermi system at is investigated. Density and spin-density fluctuations and collective modes are treated on an equal basis. Use is made of Ward identities to relate the vertex function to the quasiparticle self-energy , and logarithmic corrections to the self-energy are obtained. The coefficients of the logarithmic terms are calculated analytically in terms of known Landau parameters.
- Received 3 July 1968
DOI:https://doi.org/10.1103/PhysRev.175.313
©1968 American Physical Society