Now showing items 1-11 of 11

  • A+B=0 reaction with different initial patterns 

    Sancho, Jose Maria; Romero, A. H.; Lindenberg, Katja; Sagués Mestre, Francesc; Reigada Sanz, R.; Lacasta Palacio, Ana María (American Chemical Society, 1996-10-10)
    Article
    Restricted access - publisher's policy
    We present a detailed study of the chemical reaction A + B f 0 in two dimensions for different initial distributions of reactants as characterized by the structure function. We argue that the long-wavelength components ...
  • Escape over a potential barrier driven by colored noise: large but finite correlation time 

    de la Rubia, Francisco Javier; Peacock-López, E.; Tsironis, G P; Lindenberg, Katja; Ramírez de la Piscina Millán, Laureano; Sancho, Jose Maria (1988)
    Article
    Open Access
    The recent theory of Tsironis and Grigolini for the mean first-passage time from one metastable state to another of a bistable potential for long correlation times of the noise is extended to large but finite correlation times.
  • First-passage time in a bistable potential with colored noise 

    Ramírez de la Piscina Millán, Laureano; Sancho, Jose Maria; de la Rubia, Francisco Javier; Lindenberg, Katja; Tsironis, G P (1989-08-15)
    Article
    Open Access
    A precise digital simulation of a bistable system under the effect of colored noise is carried out. A set of data for the mean first-passage time is obtained. The results are interpreted and compared with presently available ...
  • Langevin dynamics of A+A reactions in one dimension 

    Sancho, Jose Maria; Romero, A. H.; Lacasta Palacio, Ana María; Lindenberg, Katja (IOP Publishing, 2007-02-28)
    Article
    Open Access
    We propose a set of Langevin equations of motion together with a reaction rule for the study of binary reactions. Our scheme is designed to address this problem for arbitrary friction ° and temperature T. It easily ...
  • Numerical study of A+A -> 0 and A+B ->0 reactions with inertia 

    Romero, A. H.; Lacasta Palacio, Ana María; Sancho, Jose Maria; Lindenberg, Katja (American Institute of Physics, 2007-11-30)
    Article
    Open Access
    Using numerical methods we study the annihilation reactions A + A → 0 and A + B → 0 in one and two dimensions in the presence of inertial contributions to the motion of the particles. The particles move freely following ...
  • Sorting of mesoscopic particles driven through periodic potential landscapes 

    Lacasta Palacio, Ana María; Khoury, M.; Sancho, Jose Maria; Lindenberg, Katja (World Scientific Publishing, 2006-10-01)
    Article
    Open Access
    Sorting of colloidal particles of different sizes is of importance in the transport and delivery of such particles in biological, materials science, and other technological contexts. A successful methodology involves the ...
  • Speeding chemical reactions by focusing 

    Lacasta Palacio, Ana María; Ramírez de la Piscina Millán, Laureano; Sancho Herrero, José María; Lindenberg, Katja (2013-04-11)
    Article
    Open Access
    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 two components are well mixed and consequently ...
  • Transport and diffusion on a body-centered-cubic bcc(110) surface under a constant external force 

    Lindenberg, Katja; Lacasta Palacio, Ana María; Sancho, Jose Maria; Romero, Aldo H. (SPIE--The International Society for Optical Engineering, 2005-08-31)
    Conference lecture
    Restricted access - publisher's policy
    We present a numerical study of classical particles obeying a Langevin equation moving on a solid bcc(110) surface. The particles are subject to a two dimensional periodic and symmetric potential of rectangular symmetry ...
  • Transport and diffusion on crystalline surfaces under external forces 

    Lindenberg, Katja; Lacasta Palacio, Ana María; Sancho, Jose Maria; Romero, A. H. (IOP Publishing, 2005-01-31)
    Article
    Open Access
    We present a numerical study of classical particles obeying a Langevin equation and moving on a solid crystalline surface under an external force that may either be constant or modulated by periodic oscillations. We focus ...
  • Weak disorder in periodic potentials: anomalous transport and diffusion 

    Lindenberg, Katja; Sancho, Jose Maria; Khoury Arvelo, María José; Lacasta Palacio, Ana María (2012-03-31)
    Article
    Restricted access - publisher's policy
    Particles driven through a periodic potential by an external constant force are known to exhibit a pronounced peak of the diffusion around the critical deterministic force that defines the transition between locked and ...
  • Weak Disorder: Anomalous Transport and Diffusion Are Normal Yet Again 

    Khoury Arvelo, María José; Lacasta Palacio, Ana María; Sancho, Jose Maria; Lindenberg, Katja (2011-03)
    Article
    Open Access
    We carry out a detailed study of the motion of particles driven by a constant external force over a landscape consisting of a periodic potential corrugated by a small amount of spatial disorder. We observe anomalous ...