Low Temperature Physics: 37, 782 (2011); https://doi.org/10.1063/1.3665869 (3 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 9-10 (September 2011), p. 982-984 ( to contents , go back )
Collective modes in quantum Fermi liquid
Nodar L. Tsintsadze and Levan N. Tsintsadze
E. Andronikashvili Institute of Physics, Tbilisi State University, Tbilisi, Georgia
Received February 23, 2011
Landau’s theory of Fermi liquids is generalized by incorporating the de Broglie waves diffraction. A newly derived kinetic equation of the Fermi particles is used to derive a general dispersion relation and the excitation of zero sound is studied. A new mode is found due to the quantum correction. It is shown that the zero sound can exist even in an ideal Fermi gas. We also disclose a new branch of frequency spectrum due to the weak interaction.
PACS: 67.30.–n 3He;
Key words: Fermi liquid, excitation, quasiparticles, de Broglie waves.