General properties of systems with linear couplings between bosons and other dynamic variables

K. M. Leung, D. L. Huber

    Research output: Contribution to journalArticle

    Abstract

    A variety of physical systems, as for example, Jahn-Teller crystals, the coupled phonon-pseudospin model of the ferroelectric KDP (KH2PO4), one-dimensional conductors, and the Dicke model of super-radiance, are characterized by linear couplings between bosons (e.g., phonons) and other dynamic variables (e.g., electrons). Using a general Hamiltonian we explore various properties of such systems. We find that there are exact relations connecting the phonon static correlation functions to those of the electrons. A similar set of relations is also derived for their relaxation functions. The dynamics is then studied employing a relaxation-function formalism.

    Original languageEnglish (US)
    Pages (from-to)1139-1146
    Number of pages8
    JournalPhysical Review B
    Volume20
    Issue number3
    DOIs
    StatePublished - 1979

    ASJC Scopus subject areas

    • Condensed Matter Physics

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