New DNLS Equations for Anharmonic Vibrational Impurities
arXiv:cond-mat/0206209 · doi:10.1142/S0217984903004890
Abstract
We examine some new DNLS-like equations that arise when considering strongly-coupled electron-vibration systems, where the local oscillator potential is anharmonic. In particular, we focus on a single, rather general nonlinear vibrational impurity and determine its bound state(s) and its dynamical selftrapping properties.
16 pages, 5 figures