Publications (22)
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…
Optimal search strategies of space-time coupled random walkers with finite lifetimes
D. Campos, E. Abad, V. Méndez +2
We present a simple paradigm for detection of an immobile target by a space-time coupled random walker with a finite lifetime. The motion of the walker is characterized by linear d…
On the Collective Behavior of Parametric Oscillators
I. Bena, R. Kawai, C. Van den Broeck +2
We revisit the mean field model of globally and harmonically coupled parametric oscillators subject to periodic block pulses with initially random phases. The phase diagram of regi…
Asymptotic solutions of decoupled continuous-time random walks with superheavy-tailed waiting time and heavy-tailed jump length distributions
S. I. Denisov, S. B. Yuste, Yu. S. Bystrik +2
We study the long-time behavior of decoupled continuous-time random walks characterized by superheavy-tailed distributions of waiting times and symmetric heavy-tailed distributions…
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…
Motor Proteins Have Highly Correlated Brownian Engines
G. P. Tsironis, K. Lindenberg
Two headed motor proteins, such as kinesin and dynein, hidrolyze environmental ATP in order to propel unidirectionally along cytoskeletal filaments such as microtubules. In the cas…
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.…
Intermittent random walks for an optimal search strategy: One-dimensional case
G. Oshanin, H. S. Wio, K. Lindenberg +1
We study the search kinetics of an immobile target by a concentration of randomly moving searchers. The object of the study is to optimize the probability of detection within the c…
A reaction-subdiffusion model of fluorescence recovery after photobleaching (FRAP)
S. B. Yuste, E. Abad, K. Lindenberg
Anomalous diffusion, in particular subdiffusion, is frequently invoked as a mechanism of motion in dense biological media, and may have a significant impact on the kinetics of bind…
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…
Speeding chemical reactions by focusing
A. M. Lacasta, L. Ramirez-Piscina, J. M. Sancho +1
We present numerical results for a chemical reaction of colloidal particles which are transported by a laminar fluid and are focused by periodic obstacles in such a way that the tw…
Thermal Resonance in Signal Transmission
R. Reigada, A. Sarmiento, K. Lindenberg
We use temperature tuning to control signal propagation in simple one-dimensional arrays of masses connected by hard anharmonic springs and with no local potentials. In our numeric…
Itinerant vibronic polarons: A Merrifield approach I. Low energy range calculations
S. G. Tsintsarska, M. D. Ivanovich, A. Andreev +3
We extend Merrifield's Variational Ansatz in the variational band theory of polarons to cover a frame of two electronic bands mixed by an Einstein phonon. The Hamiltonian is compos…
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…
Diffusion-Limited Reaction in One Dimension: Paired and Unpaired Nucleation
S. Habib, K. Lindenberg, G. Lythe +1
We consider the dynamics of diffusing particles in one space dimension with annihilation on collision and nucleation (creation of particles) with constant probability per unit time…
Variational band theory of vibronic polarons in crystals. II. Extending Merrifield's Ansatz
D. W. Brown, K. Lindenberg, M. Georgiev
Merrifield's Variational Ansatz is extended so as to cover the case of two electronic bands mixed by an Einstein phonon. The Hamiltonian is composed of the local and kinetic (hoppi…
On the non-equivalence of two standard random walks
O. Benichou, K. Lindenberg, G. Oshanin
We focus on two models of nearest-neighbour random walks on d-dimensional regular hyper-cubic lattices that are usually assumed to be identical - the discrete-time Polya walk, in w…
Application of Fractional Calculus to Reaction-Subdiffusion Processes and Morphogen Gradient Formation
S. B. Yuste, E. Abad, K. Lindenberg
It is a well known fact that subdiffusion equations in terms of fractional derivatives can be obtained from Continuous Time Random Walk (CTRW) models with long-tailed waiting time…
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…
Measurement of the 92,93,94,100Mo(g,n) reactions by Coulomb Dissociation
K. Göbel, P. Adrich, S. Altstadt +70
The Coulomb Dissociation (CD) cross sections of the stable isotopes 92,94,100Mo and of the unstable isotope 93Mo were measured at the LAND/R3B setup at GSI Helmholtzzentrum für Sc…
Survival probability of a particle in a sea of mobile traps: A tale of tails
S. B. Yuste, G. Oshanin, K. Lindenberg +2
We study the long-time tails of the survival probability of an particle diffusing in -dimensional media in the presence of a concentration of traps that move…
Noise-induced phase transitions in field-dependent relaxational dynamics: The Gaussian ansatz
F. J. Cao, K. Wood, K. Lindenberg
We present an analytic mean field theory for relaxational dynamics in spatially extended systems that undergo purely noise-induced phase transitions to ordered states. The theory a…