207 citations · 422 across the 8 of their papers we have counts for
8 papers
From subdiffusion to superdiffusion of particles on solid surfaces
A. M. Lacasta, J. M. Sancho, A. H. Romero +2
We present a numerical and partially analytical study of classical particles obeying a Langevin equation that describes diffusion on a surface modeled by a two dimensional potentia…
Diffusion on a solid surface: Anomalous is normal
J. M. Sancho, A. M. Lacasta, K. Lindenberg +2
We present a numerical study of classical particles diffusing on a solid surface. The particles' motion is modeled by an underdamped Langevin equation with ordinary thermal noise.…
Harvesting Thermal Fluctuations: Activation Process Induced by a Nonlinear Chain in Thermal Equilibrium
R. Reigada, A. Sarmiento, A. H. Romero +2
We present a model in which the immediate environment of a bistable system is a molecular chain which in turn is connected to a thermal environment of the Langevin form. The molecu…
Enhanced Pulse Propagation in Non-Linear Arrays of Oscillators
A. Sarmiento, R. Reigada, A. H. Romero +1
The propagation of a pulse in a nonlinear array of oscillators is influenced by the nature of the array and by its coupling to a thermal environment. For example, in some arrays a…
Electron-Phonon Correlations, Polaron Size, and the Nature of the Self-Trapping Transition
A. H. Romero, David W. Brown, Katja Lindenberg
We analyze electron-phonon correlation functions measured in 1D polaron ground states of the Holstein Hamiltonian using the Global-Local variational method. The spatial collapse of…
One-Dimensional Arrays of Oscillators: Energy Localization in Thermal Equilibrium
R. Reigada, A. H. Romero, A. Sarmiento +1
All systems in thermal equilibrium exhibit a spatially variable energy landscape due to thermal fluctuations. Thus at any instant there is naturally a thermodynamically driven loca…
Nonclassical Kinetics in Constrained Geometries: Initial Distribution Effects
K. Lindenberg, A. H. Romero, J. M. Sancho
We present a detailed study of the effects of the initial distribution on the kinetic evolution of the irreversible reaction A+B -> 0 in one dimension. Our analytic as well as nume…
The Self-Trapping Line of the Holstein Molecular Crystal Model in One Dimension
A. H. Romero, David W. Brown, Katja Lindenberg
The ground state of the Holstein molecular crystal model in one dimension is studied using the Global-Local variational method, analyzing in particular the total energy, kinetic en…