In the winter term 2019/20 I will offer a seminar on Earth Patterns, where we will discuss pattern formation in the geological and geophysical settings.
Fundamentals. Fluid Dynamics, Pattern Formation, Scaling and Self-Similarity Drainage Divides, Coast Lines Phase Transitions. Melting, Freezing, Segregation Cloud Formation, Rain Initiation, Gysers, Minerals, Stalactites and Iciclies Transport. Multiphase Flow, Plastic Flow, Granular Flow, Porous Media Sediment Beds, Sand Dunes and Ripples, Glaciers, Lava Flows, Land Slides and Avalanches Ground Water, Oil Production, Deep-Sea Thermal Vents Shaping the Surface. Fracture Dynamics, Avaraging and Long-Time Dynamics Faults and Cracks, Subduction, Plate Tectonics, Weathering, Sea Ice Dynamics, Large Scale Ocean and Air Flows Exoplanets. Thermodynamics, Universality Climate, Weather, Surface Structures
We aspire to give out topics to tandems of a physics student and a student with a geoscience-background.
Equivalence of position–position auto-correlations in the Slicer Map and the Lévy–Lorentz gas
Giberti, Rondoni, Tayyab, and Vollmer, Nonlinearity 32:2302 (15 May 2019)
The Slicer Map (SM) is a one-dimensional non-chaotic dynamical system that shows sub-, super-, and normal diffusion as a function of its control parameter. In a recent paper (Salari et al 2015 Chaos 25 073113) it was found that the moments of the position distributions as the SM have the same asymptotic behaviour as the Lévy–Lorentz gas (LLg), a random walk on the line in which the scatterers are randomly distributed according to a Lévy-stable probability distribution. Here we derive analytic expressions for the position–position correlations of the SM and, on the ground of this result, we formulate some conjectures about the asymptotic behaviour of position–position correlations of the LLg, for which the information in the literature is minimal. The numerically estimated position–position correlations of the Lévy–Lorentz show a remarkable agreement with the conjectured asymptotic scaling.
See the article outline for more information.
On 1 February 2019 I have been appointed as a
at the University of Leipzig
The 10th International Conference Dynamical Systems Applied to Biology and Natural Sciences (DSABNS) addresses theoretical methods and practical applications in population dynamics, eco-epidemiology, epidemiology of infectious diseases, molecular and antigenic evolution and methodical topics in the natural sciences and mathematics.
At the workshop I will give a plenary talk on
Domain Drift and Cell Polarization Processes
In the winter term 2018/19 I will offer a seminar on Physics of Music, where we will discuss different aspects of music, sound generation and sound processing. The topics will cover
Fundamentals. from Pythagorean harmonics to well-tempered scales about hearing and singing Reproduction. from shellac to MP3 about theremins, drum maschines, and synthezising music Vibrations. singularities on picked and bowed strings can you hear the shape of a drum? amplification and locking in resonance cavities from the singing saw to the modern violin Compressible Flows. from sound waves to music from pipes to trumpets and clarinets
In April 2018 I start my new position as a
Characterizing rare fluctuations in soft particulate flows
Rahbari, Saberi, Park, and Vollmer, Nature Communications 8:11 (10 April 2017)
Soft particulate media include a wide range of systems involving athermal dissipative particles both in non-living and biological materials. Characterization of flows of particulate media is of great practical and theoretical importance. A fascinating feature of these systems is the existence of a critical rigidity transition in the dense regime dominated by highly intermittent fluctuations that severely affects the flow properties. Here, we unveil the underlying mechanisms of rare fluctuations in soft particulate flows. We find that rare fluctuations have different origins above and below the critical jamming density and become suppressed near the jamming transition. We then conjecture a time-independent local fluctuation relation, which we verify numerically, and that gives rise to an effective temperature. We discuss similarities and differences between our proposed effective temperature with the conventional kinetic temperature in the system by means of a universal scaling collapse.
In parallel to the European Symposium on Friction, Wear, Wear Protection and Related Areas there will be a symposium on friction in winter sports (in German). It will address scientific issues in a way that is accessible to interested sport practitioners.
I will contribute the presentation
Eislaufen und Reibung auf Eis
The Eighth Workshop Dynamical Systems Applied to Biology and Natural Sciences (DSABNS) will address theoretical methods and practical applications in population dynamics, eco-epidemiology, epidemiology of infectious diseases, molecular and antigenic evolution and methodical topics in the natural sciences and mathematics.
At the workshop I will give a plenary talk on
When do we see it?
When would we expect to see it?
On invitation of the Kavli Institute for Theoretical Physics China at the Chinese Academy of Sciences(KITPC-CAS) I spend August 2016 in Beijing to participate in the above workshop. The institute also supports the visit of my Masters student Thomas Staudt.
On August 17 Thomas presents a plenary lecture on our joint work
The continuum limit of the Becker-Döring Equations
On August 25 I deliver a plenary lecture on
Quasi-tight coupling far from equilibrium
In August 2016 I start my new position
Our web pages on Teaching with Mathematical Models and Instruments are launched at the
13th International Congress on Mathematical Education
Hamburg, July 24–31, 2016
Dynamics Days Europe is a series of major international conferences founded in the 1980's that provides a European forum for developments in the applications of and theory for dynamics.
At the 2016 conference I give a plenary talk on
Breaking Universality in Non-Equilibrium Statistical Physics
We offer an afternoon project
The program is intended to accelerate advances in the understanding of particle-fluid interactions and the modification of particle-particle interactions in the presence of a fluid. It brings together physicists and experts on geological processes and morphology.
On March 15 I give a plenary talk on
Growth of rain droplets in exotic environments: diffusion, sedimentation, and droplet collection