Laudatio

For his many original and outstanding contributions to dynamical systems, chaos and statistical physics

Prof. Dr. Antonio Politi

has been awarded the Martin-Gutzwiller-Fellowship 2004/2005
of the Max Planck Institute for the Physics of Complex Systems.

"Statistical Dynamics" is the headline under which Antonio Politi summarizes his broad research activities in dynamical systems, chaos, statistical physics, and applications. The name "Politi" has been intimately linked to complex dynamics since the early days of this field. Starting his career in the lab of Tito Arecchi with the study of models for laser dynamics, Antonio Politi was confronted with chaos and strange attractors. In these days where fractal dimensions were topical he made outstanding and well cited contributions to the statistics and dynamical creation of multi-fractal sets and to the consequences of non-hyperbolicity, partly in collaboration with Remo Badii and with Peter Grassberger. Working under one roof with experimentalists, he addressed many issues of experimental relevance, in particular related to laser physics and to time series analysis. As an example, his paper on dimension increase by filtering signals is a "must read" for everyone in data analysis.
The fundamental issue of complexity, its characterization and facets has inspired Antonio Politi to many research articles and to an excellent monograph together with Remo Badii.
In his modesty, he would not call his research "statistical dynamics" if this were all.
In fact, he has developed the field in three directions:
Firstly, he has taken up basic issues and new mechanisms in nonlinear dynamics, such as generating partitions, stable chaos, discrete dynamics, coupled map lattices, just to mention a few. Worth emphasizing is in particular the novel concept of chronotopic Lyapunov exponents, which generalizes linear stability analysis to arbitrary space-time-coordinates in spatially extended systems.
Secondly, he is inspecting the borderline between dynamics and statistical physics. Here he initiated research on heat conduction in chains of unharmonic oscillators as a ab-initio-verification of Fourier's law and the dynamical origin for deviations from it. Another topic in this list is dynamical localization.
Last but not least, he has applied his expertise in complex dynamics to many other fields of physics, such as polymer dynamics, wetting transitions, neural network, light-matter-interaction, and pattern formation, the latter in collaboration with another Gutzwiller Fellow, Raymond Kapral.

Dr. Politi's talk on April 18, 2005
"Dynamics of high dimensional systems: From a microscopic to a macroscopic description"

http://www.mpipks-dresden.mpg.de/pages/forschung/forschung_gutzwiller.html