Summary
A Fermi system with Coulomb interactions is studied with two time-retarded Green’s functions. A method of decoupling is proposed for obtaining collective effects and the thermodynamic potential. The plasmon damping for low temperatures is calculated, as well as the momentum dependence of the occupation number in general and its discontinuity across the Fermi surface in particular.
Riassunto
Si stadia con due funzioni di Green ritardate nel tempo un sistema di Fermi con interazioni coulombiane. Si propone un metodo di disaccoppiamento per ottenere gli effetti collettivi ed il Potenziale termodinamico. Si calcolano lo smorzamento del plasmone a basse temperature, la dipendenza dall’impulso del numero di occupazione, in generale, e la sua discontinuità attraverso la superficie di Fermi, in particolare.
Резюме
С помощью двухвремен ных запаздывающих функций Грина исслед уется Ферми-система с кулон овскими взаимодейст виями. Предлагается метод нарушения связи для п олучения коллективн ых эффектов и термодинамическог о потенциала. Вычисляе тся затухание плазмо на для низких температур, а т акже импульсная зависимо сть числа заполнения в общем случае, и ее скачок на п оверхности Ферми, в частности.
Similar content being viewed by others
References
V. Bonch-Bruevich andV. Tyablikov :The Green Function Method in Statistical Mechanics (Amsterdam, 1963);V. Bonch-Bruevich andS. M. Kogan:Sov. Phys. Solid State,1, 1118 (1959).
D. Pines:The Many-Body Problem, (New York, 1962).
D. N. Zubarev:Usp. Fiz. Nauk,71, 71 (1960).
M. Gell-Mann andK. Bruekner:Phys. Rev.,106, 364 (1957).
E. Montreoll andJ. Ward:Phys. Fluids,1, 55 (1958).
V. Tyablikov andV. Bonch-Bruevich:Adv. Phys.,11, 317 (1962).
G. van Hoven:Phys. Rev. Lett,17, 169 (1966).
H. Serfer andT. Simonen:Phys. Rev. Lett.,17, 172 (1966).
J. Malmberg andC. Wharton:Phys. Rev. Lett.,17, 179 (1966).
I. O. Kulik:Žurn. Ėksp. Teor. Fiz.,40, 1343 (1960) (English translation,Sov. Phys. JETP,13, 946 (1961)).
Author information
Authors and Affiliations
Additional information
To speed up publication, the author of this paper has agreed to not receive the proofs for correction.
Rights and permissions
About this article
Cite this article
Gluck, P. Two-time Green’s functions and collective effects in a Fermi system. Nuov Cim B 3, 67–72 (1971). https://doi.org/10.1007/BF02899943
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02899943