Laboratoire de Physique Théorique
Toulouse - UMR 5152

[violet]The Statistical Physics of Complex Systems group :[/violet]

The PhyStat group addresses problems arising in a wide range of domains : condensed matter physics, fluid mechanics, biophysics, soft condensed matter physics, astrophysics, stochastic processes, computer sciences, game theory, probability theory, geometry, physics of society...

Maxwell’s demon (by G. Gamow)

• Out of equilibrium physics (dynamical phase transitions, phase separation, coarsening, glassy dynamics...)
• Disordered systems (glass, granular systems, spin glasses, diffusion and absorption in random media, porous media...)
• Physics of systems with long-range interactions (self-gravitating gas, turbulence in two dimensions and stratified fluids, kinetic theory of non-mixing systems, non-Boltzmannian quasi-stationary states, astrophysics...)
• Biophysics and soft condensed matter (protein diffusion, electropermeabilization of membranes, biological engines, electrolytes, polymer and DNA dynamics, membranes ...)
• Theory of probability and of stochastic processes and their applications (persistence, reaction-diffusion models, stochastic interfaces, chemotaxis, diffusion properties in biological systems, diffusion and absorption in random media, optimization problems...)
• Physics of society (game theory & theory of competition, collective motion in animal and human groups...)

[violet]A few problems recently studied by the PhyStat group :[/violet]

• How salting DNA makes it more flexible ! (News article)
• A model of collective fish behavior with cognitive and hydrodynamic interactions (News article)
• How fish switch attention from neighbor to neighbor for seamless collective movement (News article)
• How social information can improve estimation accuracy in human groups (News article)
• Dependence of DNA Persistence Length on Ionic Strength of Solutions with Monovalent and Divalent Salts (News article)
• Swarming, schooling, milling : phase diagram of a data-driven fish school model (News article)
• Ionic Capillary Evaporation in Weakly Charged Nanopores (News article)
• Why DNA denaturation bubble closure is so long ? (News article)
• Drag forces in fluctuating fields (News article)
• Why DNA chains are "kinked" when observed on surfaces ? (News article)
• Theory of poker tournaments (News article in French / English,Article)
• Denaturation bubbles in fluctuating DNA chains (Article, News article)
• The statistics of critical points of Gaussian fields on large-dimensional spaces (Article)
• Calculating the number of random matrices with a constrained spectrum (Article)
• Probability distribution of the maximum of a random signal (News article)
• How to reproduce bacterial propulsion in a biomimetic way ? (News article)
• Gravitational collapse of a gas of Brownian particles (News article)
• 2D Decaying turbulence (News article)
• Configurational entropy of quasiperiodic tilings (News article)
• Planetary formation in turbulent disks (News article)

[violet]Scientific reports and publications of the PhyStat group :[/violet]

• Scientific report June 2014-June 2019 of the PhyStat group (pdf file in English)
• Scientific report June 2009-June 2014 of the LPT, and in particular, of the PhyStat group (pdf file in English)
• Scientific report June 2005-June 2009 of the PhyStat group (pdf file in English) including the full scientific production of the PhyStat group and the links to all preprints on ArXiv or to the corresponding journal articles
• Short introduction to the research activities of the PhyStat group
• Rapport d’activité 2002-2005 du Groupe PhyStat (en français) / Scientific report 2002-2005 of the PhyStat group (in French)