Academic literature on the topic 'Analyse microlocale et semi-classique'
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Journal articles on the topic "Analyse microlocale et semi-classique":
El Hassani, Younes, and Abderrahim Rharib. "Carrière sportive et planification de la retraite chez les footballeurs professionnels marocains." Retraite et société N° 90, no. 1 (August 21, 2023): 137–65. http://dx.doi.org/10.3917/rs1.090.0138.
Belley, Jean-Guy. "L'entreprise, l'approvisionnement et le droit. Vers une théorie pluraliste du contrat." Les Cahiers de droit 32, no. 2 (April 12, 2005): 253–99. http://dx.doi.org/10.7202/043082ar.
Sumburane, Francelino. "Littératures et conscientisation altéritaire et diversitaire en FLE au Mozambique." Didactique(s), plurilinguisme(s), mondialisation(s)(2) 2 (2024). http://dx.doi.org/10.4000/11qak.
Coulibaly, Laurent. "Enseignement bi-plurilingue au Mali : former et sensibiliser les enseignants de classes bilingues." Didactique(s), plurilinguisme(s), mondialisation(s)(2) 2 (2024). http://dx.doi.org/10.4000/11qae.
Dissertations / Theses on the topic "Analyse microlocale et semi-classique":
Prouff, Antoine. "Correspondance classique-quantique et application au contrôle d'équations d'ondes et de Schrödinger dans l'espace euclidien." Electronic Thesis or Diss., université Paris-Saclay, 2024. https://theses.hal.science/tel-04634673.
Wave and Schrödinger equations model a variety of phenomena, such as propagation of light, vibrating structures or the time evolution of a quantum particle. In these models, the high-energy asymptotics can be approximated by classical mechanics, as geometric optics. In this thesis, we study several applications of this principle to control problems for wave and Schrödinger equations in the Euclidean space, using microlocal analysis.In the first two chapters, we study the damped wave equation and the Schrödinger equation with a confining potential in the euclidean space. We provide necessary and sufficient conditions for uniform stability in the first case, or observability in the second one. These conditions involve the underlying classical dynamics which consists in a distorted version of geometric optics, due to the presence of the potential.Then in the third part, we analyze the quantum-classical correspondence principle in a general setting that encompasses the two aforementioned problems. We prove a version of Egorov's theorem in the Weyl--Hörmander framework of metrics on the phase space. We provide with various examples of application of this theorem for Schrödinger, half-wave and transport equations
Lablée, Olivier. "Autour de la dynamique semi-classique de certains systèmes complètement intégrables." Phd thesis, Grenoble 1, 2009. http://www.theses.fr/2009GRE10305.
The semi-classical dynamics of a pseudo-differential operator on a manifold is the quantum analogous of the classical flow of his main symbol on the manifold. This semi-classical dynamics is described by the Schrödinger equation of the operator whereas the classical Hamiltonian flow is given by the Hamilton's equations associated with the function. Thus the spectrum of the pseudo-differential operator enable to describe the general solutions of the associated Schrödinger equation. The long time behavior of these solutions remains in many ways mysterious. The semi-classical dynamics depends directly on the spectrum of the operator and consequently also on the underlying geometry into induced by the classical symbol. In this thesis, we first describe the long time semi-classical dynamics of an Hamiltonian in the one-dimensional case with a symbol function with no singularity or with non-degenerate elliptic singularity type : the associated fibers are closed elliptic orbits. The regular Bohr-Sommerfeld rules supply the spectrum of the operator. We are also interested in the elliptic case of the dimension 2 which leads to some discussion of numbers theory. Finally we consider the case of a one-dimensionnal pseudo-differential operator with a non-degenerate hyperbolic singularity : the singular fiber of in is a “ hyperbolic eight ” (this model is diffeomorphic to the Schrödinger operator with a double wells)
Lablée, Olivier. "Autour de la dynamique semi-classique de certains systèmes complètement intégrables." Phd thesis, Université Joseph Fourier (Grenoble), 2009. http://tel.archives-ouvertes.fr/tel-00439641.
Nectoux, Boris. "Analyse spectrale et analyse semi-classique pour l'étude de la métastabilité en dynamique moléculaire." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1228/document.
This thesis is dedicated to the study of the sharp asymptotic behaviour in the low temperature regime of the exit event from a metastable domain $Omegasubset mathbb R^d$ (exit point and exit time) for the overdamped Langevin process. In practice, the overdamped Langevin dynamics can be used to describe for example the motion of the atoms of a molecule or the diffusion of interstitial impurities in a crystal. The obtention of sharp asymptotic approximations of the first exit point density in the small temperature regime is the main result of this thesis. These results justify the use of the Eyring-Kramers law to model the exit event. The Eyring-Kramers law is used for example to compute the transition rates between the states of a system in a kinetic Monte-Carlo algorithm in order to sample efficiently the state-to-state dynamics. The cornerstone of our analysis is the quasi stationary distribution associated with the overdamped Langevin dynamics in $Omega$. The proofs are based on tools from semi-classical analysis. This thesis is divided into three independent chapters. The first chapter (in French) is dedicated to an introduction to the mathematical results. The other two chapters (in English) are devoted to the precise statements and proofs
Raffaelli, Bernard. "Analyse semi-classique des phénomènes de résonance et d'absorption par des trous noirs." Phd thesis, Université Pascal Paoli, 2011. http://tel.archives-ouvertes.fr/tel-00653074.
Raffaelli, Bernard. "Analyse semi-classique des phénomènes de résonance et d’absorption par des trous noirs." Corte, 2011. https://tel.archives-ouvertes.fr/tel-00653074.
Beyond the mathematical definition of a black hole as a solution of Einstein equations in vacuum, there are some observational clues, as pointed out by Kip Thorne, from the first observation of the binary system Cygnus X1 to recent assumptions related to the presence of hypothetical supermassive black holes in the center of various galaxies, concerning their existence in our Universe and consequently encouraging their study. In physics, it is wellknown that in order to obtain information on interactions between fundamental particles, atoms, molecules, etc…, and on the structure of composite objects, we have to make collision experiments or, more precisely, scattering experiments. This is precisely the aim of this work. Indeed, studying how a black hole can interact with its environment, we should obtain fundamental information about those “invisible objects”. This work is also useful to understand the kind of signals one could detect by the future gravitational waves astronomy devices. This thesis is mainly focused on resonance and absorption phenomena by black holes. The originality of this study is about the use of a semiclassical method known as the “complex angular momentum theory”, which brings concepts like S matrix, Regge poles techniques, into high energy black hole physics as suggested implicitly by Chandrasekhar in the middle of the seventies. This approach allows us to have simple and quite intuitive physical interpretations of resonance and absorption phenomena related to the scattering of a scalar, massive or not, field by black holes
CHARLES, Laurent. "Aspects semi-classiques de la quantification géométrique." Phd thesis, Université Paris Dauphine - Paris IX, 2000. http://tel.archives-ouvertes.fr/tel-00001289.
Bouclet, Jean-Marc. "Distributions spectrales pour des operateurs perturbes." Phd thesis, Université de Nantes, 2000. http://tel.archives-ouvertes.fr/tel-00004025.
Stingo, Annalaura. "Problèmes d’existence globale pour les équations d’évolution non-linéaires critiques à données petites et analyse semi-classique." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD093.
In this thesis we study the problem of global existence of solutions to critical quasi-linear Klein-Gordon equations – or to critical quasi-linear coupled wave-Klein-Gordon systems – when initial data are small, smooth, decaying at infinity, in space dimension one or two. We first study this problem for Klein-Gordon equations with cubic non-linearities in space dimension one. It is known that, under a suitable structure condition on the non-linearity, the global well-posedness of the solution is ensured when initial data are small and compactly supported. We prove that this result holds true even when initial data are not localized in space but only mildly decaying at infinity, by combining the Klainerman vector fields’ method with a semi-classical micro-local analysis of the solution. The second and main contribution to the thesis concerns the study of the global existence of solutions to a quadratic quasilinear wave-Klein-Gordon system in space dimension two, again when initial data are small smooth and mildly decaying at infinity. We consider the case of a model non-linearity, expressed in terms of "nullforms". Our aim is to obtain some energy estimates on the solution when some Klainerman vector fieldsare acting on it, and sharp uniform estimates. The former ones are recovered making systematically use of normal forms’ arguments for quasi-linear equations, in their para-differential version. We derive the latter ones by deducing a system of ordinary differential equations from the starting partial differential system, this strategy maying leading us in the future to treat the case of the most general non-linearities
Quang, Sang Phan. "Monodromie d'opérateurs non auto-adjoints." Phd thesis, Université Rennes 1, 2012. http://tel.archives-ouvertes.fr/tel-00730517.