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What do polarons owe to their harmonic origins?

✍ Scribed by V.M. Kenkre

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
684 KB
Volume
113
Category
Article
ISSN
0167-2789

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✦ Synopsis

Polaron (and related) soliton concepts are based on the assumption that quasiparticles are in linear interaction with harmonic oscillators. The discrete nonlinear Schriidinger equation and its semiclassical relatives are also based on this assumption. Study ofthe effects of nonlinearity in interaction. and anharmonicity in the restoring force of the oscillators. has led to notable results such as saturation of nonlinearities and counterintuitive pheonomena such as destruction of self-trapping on increasing the nonlinearity. We report on these and related results. The geneml aim of the investigation is to determine what polarona owe to their harmonic (and linear) origins and how a generalized conceptual framework may be built which includes known polaron physics as a subset.

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