elementary excitation

elementary excitation

[‚el·ə′men·trē ‚ek‚sī′tā·shən]
(quantum mechanics)
The quantum of energy of some vibration or wave, such as a photon, phonon, plasmon, magnon, polaron, or exciton.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Electronic [pi] [right arrow] [[pi].sup.*] excitations are subsequently introduced by using configuration interaction (singles) (CI-S) theory where we write the excited state wave function as a linear combination of elementary excitations between occupied and unoccupied molecular orbitals
Their topics include the thermodynamics of surface phenomena, localized states and surface elementary excitations, calculating adhesion characteristics of metals and their melts by the density functional method, friction of surfaces of solids with no lubrication, and ferromagnetism in ultrathin films of transition metals.
This parabola crosses the Landau-Feynman dispersion curve for elementary excitations in superfluid [.sup.4]He at 2[pi]/k* = 0.89 nm and E* = h[omega] = 12 K.
of Parma, Italy) examines the elementary excitations in magnetic periodic structures, the spin waves or magnons, which are shown to behave like an ideal Bose gas at low temperature and an interacting Bose system at higher temperature.
Raman scattered light originates from objects related to atoms and molecules in matter, such as chemical bonds in molecules and the elementary excitations in solids, says Zhang (physics, Peking U.), so Raman spectroscopy has no trouble studying nanostructures directly.