What is a quasi-particle? | Zendy

J. R. Schrieffer | Zendy

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What is a quasi-particle?

Author(s) -

J. R. Schrieffer

Publication year - 1970

Publication title -

journal of research of the national bureau of standards section a physics and chemistry

Language(s) - English

Resource type - Journals

eISSN - 2376-5704

pISSN - 0022-4332

DOI - 10.6028/jres.074a.044

Subject(s) - renormalization , physics , particle (ecology) , wave–particle duality , excitation , statistical physics , function (biology) , fermi liquid theory , domain (mathematical analysis) , particle system , classical mechanics , quantum electrodynamics , quantum mechanics , electron , mathematics , mathematical analysis , computer science , oceanography , evolutionary biology , biology , geology , operating system

The concept of a quasi-particle excitation in an interacting many-body system will be discussed from both the physical and the mathematical points of view. The physical origin of mass enhancement, wave function renormalization, interactions between quasi-particles, etc . will be presented. Landau's Fermi liquid theory, including the quasi-particle kinetic equation, will be reviewed. Finally, the domain of validity of the quasi-particle approximation will be discussed.

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