Centre de Physique Théorique

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Dynamical Systems: Theory and Applications

Group “Classical and Quantum Dynamical Systems”

Statistical Properties of Dynamical Systems: Probabilistic methods are used to study limit theorems in the case of deterministic and random dynamical systems, especially the central limit theorem (CLT), the Almost Sure Invariance Principle, the large deviations and the distribution of rare events.
The rate of decay of correlations for non-uniformly hyperbolic systems is estimated through new techniques (coupling, renewal). Random systems (by random composition of maps acting on the same space) and sequential dynamical systems (non-stationary, or non-autonomous, processes where a concatenation of maps act on a space) are also studied. We have formulated and develop the extreme value theory for random and non-autonomous systems and with the extension to coupled map lattices.

Fusion plasma physics : We develop reduced Hamiltonian fluid and kinetic models from Dirac’s constraint theory to investigate fundamental mechanisms of turbulent magnetized plasma that deteriorate the confinement in tokamak devices. Spurious instabilities in non-Hamiltonian hybrid model for interaction of energetic particles with a thermal plasma are also investigated, as well as
secondary instabilities following magnetic reconnection. Another part of the research activity concerns the application of the theory of stochastic processes to study the formation of transport barriers in tokamaks.

Biophysics : We focus on the fundamental physical processes, in particular resonant electrodynamic forces acting at a long distance, which are surmised to be responsible of the high efficiency of the molecular machinery within living cells and long-range coherence in biological systems. This activity is pursued on both theoretical and experimental sides in collaboration with molecular biologists.

Complexity: New methods of measuring networks complexity are developed within the framework of Riemannian Information Geometry. Applications to protein interaction networks in cancer cells are being developed.

Directory of Members

Aschbacher Walter University faculty
+33.4.91.26.95.16 Email
Bui Olivier PhD candidate
Email
Caby Théophile PhD candidate
Email
Delliaux Stéphane Guest
Email
Floriani Elena University faculty
+33.4.91.26.95.22 Email
Ghoudi Hamza PhD candidate
Email
Gori Matteo Postdoctoral researcher
Email
Lechelon Mathias Postdoctoral researcher
Email
Leoncini Xavier University faculty
Référent pôle de recherche interdisciplinaire et intersectoriel AMU - Energie
+33.4.91.26.95.38 Email
Maestri Stefano PhD candidate
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Pettini Marco University faculty
Chef de l’équipe « Systèmes dynamiques : théories et applications »
+33.4.91.26.95.24 Email
Rejeiba Tarek PhD candidate
Email
Vaienti Sandro University faculty
+33.4.91.26.95.44 Email
Valvo Lorenzo PhD candidate
Email
Vittot Michel Researcher
Chef du Groupe « Systèmes dynamiques classiques et quantiques »
+33.4.91.26.95.24 Email
Wang Tianbo PhD candidate
Email

List of Publications

201 results
Journal article
Elena Floriani, Ricardo Lima, Ouerdia Ourrad, Lionel Spinelli
Flux through a Markov chain
Chaos, Solitons and Fractals, Elsevier, 2016, 93, pp.136 - 146. 〈10.1016/j.chaos.2016.10.006〉
Journal article
Shun Ogawa, Benjamin Cambon, Xavier Leoncini, Michel Vittot, Diego Del Castillo Negrete, Guilhem Dif-Pradalier, Xavier Garbet
Full particle orbit effects in regular and stochastic magnetic fields
Physics of Plasmas, American Institute of Physics, 2016, 23 (072506), 〈10.1063/1.4958653〉
Journal article
Shun Ogawa, Xavier Leoncini, Guilhem Dif-Pradalier, Xavier Garbet
Study on creation and destruction of transport barriers via effective safety factors for energetic particles
Physics of Plasmas, American Institute of Physics, 2016, 23 (122510), 〈10.1063/1.4972092〉
Journal article
Davide Faranda, Jorge Milhazes Freitas, Pierre Guiraud, Sandro Vaienti
Statistical Properties of Random Dynamical Systems with Contracting Direction
Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2016, 49, pp.204001 〈10.1088/1751-8113/49/20/204001〉
Journal article
Emanuele Tassi, Pierre-Louis Sulem, Thierry Passot
Reduced models accounting for parallel magnetic perturbations: gyrofluid and FLR-Landau fluid approaches
Journal of Plasma Physics, Cambridge University Press (CUP), 2016, 82 (6), pp.705820601. 〈10.1017/S0022377816000921〉
Journal article
E Tassi
Hamiltonian reduced fluid model for plasmas with temperature and heat flux anisotropies
Theoretical and Mathematical Physics, Consultants bureau, 2016, 188 (3), pp.1377 - 1393. 〈10.1134/S0040577916090099〉
Journal article
Matthew Nicol, Andrew Török, Sandro Vaienti
Central limit theorems for sequential and random intermittent dynamical systems
Ergodic Theory and Dynamical Systems, Cambridge University Press (CUP), 2016
Conference paper
Shun Ogawa, Benjamin Cambon, Xavier Leoncini, Diego Del Castillo Negrete, Michel Vittot, Guilhem Dif-Pradalier, Xavier Garbet
A study of full particle orbit effects in stochastic magnetic fields
57th Annual Meeting of the APS Division of Plasma Physics, Nov 2015, Savannah, United States. Bulletin of the American Physical Society, 60 (19), 2015, Bulletin of the American Physical Society
Journal article
C Chandre
Incomplete Dirac reduction of constrained Hamiltonian systems
Annals of Physics, 2015, 361, pp.1. 〈http://dx.doi.org/10.1016/j.aop.2015.06.011〉
Journal article
M Perin, Cristel Chandre, P.J. Morrison, E Tassi
Hamiltonian fluid closures of the Vlasov-Ampère equations: from water-bags to N moment models
Physics of Plasmas, American Institute of Physics, 2015, 22, pp.092309
201 results

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