| Autor: |
de Moura FA; Instituto de Física, Universidade Federal de Alagoas, Maceió, Brazil. fidelis@fis.ufal.br, Caetano RA, Santos B |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2012 Jun 20; Vol. 24 (24), pp. 245401. Date of Electronic Publication: 2012 May 17. |
| DOI: |
10.1088/0953-8984/24/24/245401 |
| Abstrakt: |
In this paper we report new numerical results on the disordered Schrödinger equation with nonlinear hopping. By using a classical harmonic Hamiltonian and the Su-Schrieffer-Heeger approximation we write an effective Schrödinger equation. This model with off-diagonal nonlinearity allows us to study the interaction of one electron and acoustical phonons. We solve the effective Schrödinger equation with nonlinear hopping for an initially localized wavepacket by using a predictor-corrector Adams-Bashforth-Moulton method. Our results indicate that the nonlinear off-diagonal term can promote a long-time subdiffusive regime similar to that observed in models with diagonal nonlinearity. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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