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Artykuły w czasopismach na temat "Systèmes désordonnés et apériodiques"
Damay, P. "Structure et dynamique des systèmes désordonnés". Journal de Physique IV (Proceedings) 111 (wrzesień 2003): 3–17. http://dx.doi.org/10.1051/jp4:2002816.
Pełny tekst źródłaBarnes, A. C., H. E. Fischer i P. S. Salmon. "La structure des systèmes désordonnés et sa mesure par diffraction". Journal de Physique IV (Proceedings) 111 (wrzesień 2003): 59–95. http://dx.doi.org/10.1051/jp4:2002818.
Pełny tekst źródłaCadars, Sylvian, Mathieu Allix, Franck Fayon, Emmanuel Véron i Dominique Massiot. "Complémentarité de la RMN, la modélisation et la diffraction pour une cristallographie des systèmes désordonnés". Reflets de la physique, nr 44-45 (lipiec 2015): 50–55. http://dx.doi.org/10.1051/refdp/20154445050.
Pełny tekst źródłaChoquet-Geniet, Annie, i Sadouanouan MALO. "Scheduling an aperiodic flow within a real-time system using Fairness properties". Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées Volume 18, 2014 (7.11.2014). http://dx.doi.org/10.46298/arima.1980.
Pełny tekst źródłaRozprawy doktorskie na temat "Systèmes désordonnés et apériodiques"
Triozon, François. "Diffusion quantique et conductivité dans les systèmes apériodiques". Phd thesis, Université Joseph Fourier (Grenoble), 2002. http://tel.archives-ouvertes.fr/tel-00002292.
Pełny tekst źródłaVoliotis, Dimitrios. "Contribution à l’étude des chaînes de spin quantique avec une perturbation aléatoire ou apériodique". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0253/document.
Pełny tekst źródłaIn the present thesis, the critical and off-critical behaviors of quantum spin chains in presence of a random or an aperiodic perturbation of the couplings is studied. The critical behavior of the Ising and Potts random quantum chains is known to be governed by the same Infinite-Disorder Fixed Point. We have implemented a numerical version of the Strong-Disorder Renormalization Group (SDRG) to test this prediction. We then studied the quantum random Ashkin-Teller chain by Density Matrix Renormalization Group. The phase diagram, previously obtained by SDRG, is confirmed by estimating the location of the peaks of the integrated autocorrelation times of both the spin-spin and polarization-polarization autocorrelation functions and of the disorder fluctuations of magnetization and polarization. Finally, the existence of a double-Griffiths phase is shown by a detailed study of the decay of the off-critical autocorrelation functions. As expected, a divergence of the dynamical exponent is observed along the two transition lines. In the aperiodic case, we studied both the Ising and Potts quantum chains. Using numerical SDRG, we confirmed the known analytical results for the Ising chains and proposed a new estimate of the magnetic scaling dimension.For the quantum q-state Potts chain, we estimated the magnetic scaling dimension for various aperiodic sequences and showed that it is independent of q for all sequences with a vanishing wandering exponent. However, we observed that the dynamical exponent is finite and increases with the number of states q. In contrast, for the Rudin-Shapiro sequence, the results are compatible with an Infinite-Disorder Fixed Point with a diverging dynamical exponent, equipe de renormalization
Pujol, Pierre. "Théories conformes et systèmes désordonnés". Phd thesis, Université Pierre et Marie Curie - Paris VI, 1996. http://tel.archives-ouvertes.fr/tel-00001167.
Pełny tekst źródłaLuck, Jean-Marc. "Propriétés critiques de systèmes désordonnés". Paris 6, 1986. http://www.theses.fr/1986PA066122.
Pełny tekst źródłaCarvalho, Bezerra Sérgio de. "Étude asymptotique de certains systèmes désordonnés". Thesis, Nancy 1, 2007. http://www.theses.fr/2007NAN10053/document.
Pełny tekst źródłaThis thesis basically study two kinds of disorder systems. The first one the spin glasses and second one the directed polymers into a random environment. These two research themes can be solved by the utilization of the same tools. Although they are strongly different by the nature of the interactions and the geometry structure that they create. In few words, we give a summary: For the Sherrington-Kirkpatrick Spin Glasses model, we make an asymptotic study of the multiple overlap function which generalizes the typical two configuration overlap function. Afterward, we develop a central limit theorem for the partition function of a localized Sherrigton-Kirkpatrick model. At the end, we obtain a study of the partition function and a result of super-diffusivity for a brownien directed polymer model into an random gaussian environment
Tissier, Matthieu. "Une approche non perturbative de systèmes frustrés et de systèmes désordonnés". Phd thesis, Université Paris-Diderot - Paris VII, 2001. http://tel.archives-ouvertes.fr/tel-00001045.
Pełny tekst źródłaGueudré, Thomas. "Physique statistique des systèmes désordonnés". Thesis, Paris, Ecole normale supérieure, 2014. http://www.theses.fr/2014ENSU0009/document.
Pełny tekst źródłaThis Thesis presents several aspects of the stochastic growth, through its most paradig-matic model, the Kardar-Parisi-Zhang equation (KPZ). Albeit very simple, this equa-tion shows a rich behaviour and has been extensively studied for decades. The existenceof a new universality class is now well established, containing numerous growth modelslike the Eden model or the Polynuclear Growth Model. The KPZ equation is closelyrelated to optimisation problems (the Directed Polymer) or turbulence of uids (theBurgers equation), a feature that underlines its importance. Nonetheless, the bound-aries of this universality class are still vague. The focus of this Thesis is to probe thoselimits through various modifications of the models. It is divided in four chapters:i) First, we present theoretical tools, borrowed from integrable systems, that allowto characterize in great details the evolution of the interface. Those tools exhibitconsiderable exibility due to the large corpus of work on integrable systems, and weillustrate it by tackling the case of confined geometry (growth close to a hard wall).ii) We investigate the inuence of the disorder distribution, and more specificallythe importance of large events, with heavy-tailed distributions. Those extreme eventsstretch the interface and notably modify the main scaling exponents. The consequenceson optimization strategies in disorder landscapes are emphasized.iii) The presence of correlations in the disorder is of natural experimental interest.Although they do not impact the KPZ class, they greatly inuence the average speed ofgrowth. The latter quantity is often overlooked because it is non-universal and ratherill-defined. Nonetheless, we show that a generic optimal average speed exists in presenceof time correlations, due to a competition between exploration and exploitation.iv) Finally, we consider a set of experiments about chemical front growth in porousmedium. While this growth process is not related to KPZ in an immediate way, wepresent different tools that effciently reproduce the observations.Along that work, the consequences of each Chapter in various domains, like opti-misation strategies, turbulence, population dynamics or finance, are detailed
Bocquet, Marc. "Chaînes de Spins, Fermions de Dirac, et Systèmes Désordonnés". Phd thesis, Ecole Polytechnique X, 2000. http://tel.archives-ouvertes.fr/tel-00001560.
Pełny tekst źródłaSchehr, Grégory. "Thermodynamique et dynamique hors d'équilibre de systèmes élastiques désordonnés". Paris 6, 2003. http://www.theses.fr/2003PA066482.
Pełny tekst źródłaDelorme, Mathieu. "Processus stochastiques et systèmes désordonnés : autour du mouvement Brownien". Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEE058/document.
Pełny tekst źródłaIn this thesis, we study stochastic processes appearing in different areas of statistical physics: Firstly, fractional Brownian motion is a generalization of the well-known Brownian motion to include memory. Memory effects appear for example in complex systems and anomalous diffusion, and are difficult to treat analytically, due to the absence of the Markov property. We develop a perturbative expansion around standard Brownian motion to obtain new results for this case. We focus on observables related to extreme-value statistics, with links to mathematical objects: Levy’s arcsine laws and Pickands’ constant. Secondly, the model of elastic interfaces in disordered media is investigated. We consider the case of a Brownian random disorder force. We study avalanches, i.e. the response of the system to a kick, for which several distributions of observables are calculated analytically. To do so, the initial stochastic equation is solved using a deterministic non-linear instanton equation. Avalanche observables are characterized by power-law distributions at small-scale with universal exponents, for which we give new results