Quantum Breathers in Electron-Phonon Systems
| Autor: | W.Z. Wang, A. R. Bishop, R. N. Silver, J.T. Gammel |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Physics
Hamiltonian mechanics Condensed matter physics Breather Exciton FOS: Physical sciences General Physics and Astronomy Condensed Matter - Soft Condensed Matter Type (model theory) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Coupling (probability) Condensed Matter::Materials Science Nonlinear system symbols.namesake Quantum mechanics Bound state symbols Soft Condensed Matter (cond-mat.soft) Nonlinear Sciences::Pattern Formation and Solitons Quantum |
| Zdroj: | Physical Review Letters. 80:3284-3287 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | Quantum breathers are studied numerically in several electron-phonon coupled finite chain systems, in which the coupling results in intrinsic nonlinearity but with varying degrees of nonadiabaticity. As for quantum nonlinear lattice systems, we find that quantum breathers can exist as eigenstates of the system Hamiltonians. Optical responses are calculated as signatures of these coherent nonlinear excitations. We propose a new type of quantum nonlinear excitation, breather-excitons, which are bound states of breathers and excitons, whose properties are clarified with a minimal exciton-phonon model. RevTex, 6 figures in one file |
| Databáze: | OpenAIRE |
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