TY - JOUR
T1 - General properties of systems with linear couplings between bosons and other dynamic variables
AU - Leung, K. M.
AU - Huber, D. L.
PY - 1979
Y1 - 1979
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.20.1139
DO - 10.1103/PhysRevB.20.1139
M3 - Article
AN - SCOPUS:35949035398
SN - 0163-1829
VL - 20
SP - 1139
EP - 1146
JO - Physical Review B
JF - Physical Review B
IS - 3
ER -