title: Probability of the emergence of helical precipitation patterns in the wake of reaction-diffusion fronts.
abstract: Helical and helicoidal precipitation patterns emerging in the wake of reaction-diffusion fronts are studied. In our experiments, these chiral structures arise with well-defined probabilities P(H) controlled by conditions such as, e.g., the initial concentration of the reagents. We develop a model which describes the observed experimental trends. The results suggest that P(H) is determined by a delicate interplay among the time and length scales related to the front and to the unstable precipitation modes and, furthermore, that the noise amplitude also plays a quantifiable role.
authors.affiliation: Department of Theoretical Physics, Eötvös University, 1117 Budapest, Hungary.
authors.forename: Shibi
authors.initials: S
authors.lastname: Thomas
authors.affiliation: Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary.
authors.forename: István
authors.initials: I
authors.lastname: Lagzi
authors.affiliation: Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, 12180 New York, USA.
authors.forename: Ferenc
authors.initials: F
authors.lastname: Molnár
authors.affiliation: Institute for Theoretical Physics-HAS, Eötvös University, 1117 Budapest, Hungary.
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Rácz