Titre :	Quelques problËmes en relativité et cosmologie : Théorie d’einstein-cartan comme alternative au problème de la matière sombre, théorie F(R) et transformation de Lorentz à l’échelle macroscopique
Type de document :	texte imprimé
Auteurs :	Amine Benachour, Auteur ; Sami Ryad Zouzou, Directeur de thèse
Editeur :	جامعة الإخوة منتوري قسنطينة
Année de publication :	2018
Importance :	98 f.
Format :	30 cm.
Note générale :	2 copies imprimées disponibles
Langues :	Français (fre)
Catégories :	Français - Anglais Physique
Tags :	Einstein-Cartan theory  Spherical symmetry  Exact solutions  Mass formula  Dark matter  f(R) theory  Ricci scalar  Common solutions  Lorentz transformation  Length contraction  Thought experiment  Tape measure  Simultaneity  Macroscopic scale  Théorie d’Einstein-Cartan  Symétrie sphérique  Solutions exactes  Formule de masse  Matière sombre  Théorie f(R)  Scalaire de Ricci  Solutions communes  Transformation de Lorentz  Contraction des longueurs  Expérience de pensée  Mètre ruban  Simultanéité  Echelle macroscopique  نظرية أينشتاين كارتن  تناظر كروي  حلول المعادلات  قانون الكتلة  المادة المظلمة  نظرية f(R)  ثابت الانحناء  حلول مشتركة  تحويل لورنز  تقلص الأطوال  تجربة فكرية  شريط قياس  تزامن  مقياس عيانى
Index. décimale :	530 Physique
Résumé :	Some current issues in cosmology lead us to consider theories of gravitation other than general relativity. It is in this context that this thesis is being taken by considering first the Einstein-Cartan theory for static and spherically symmetric spacetime where obtaining exact solutions has led to a general formula linking the internal mass of an object with spherical symmetry to its external mass, highlighting a difference in mass that would likely to provide an explanation for the dark matter problem in the universe. Another theory of gravitation which has been studied in this thesis often proposed as an alternative to the problem of dark energy; is the f(R) theory where the emphasis has been placed on its close link with general relativity by demonstrating the necessary and sufficient condition for a metric to be a solution of the two theories; whose consequences made possible the construction of f(R) theories equivalent to general relativity for a specific form of the Ricci scalar; and set the conditions on the parameters of a given model to have such equivalence. Finally, following the analysis of a thought experiment involving the measurement of the distance between two observers in motion by a tape measure, certain problems related to the application of the Lorentz transformation at the macroscopic scale have also been investigated and solved.
Diplôme :	Doctorat en sciences
En ligne :	../theses/physique/BEN7376.pdf
Format de la ressource électronique :	pdf
Permalink :	index.php?lvl=notice_display&id=11025

Quelques problËmes en relativité et cosmologie : Théorie d’einstein-cartan comme alternative au problème de la matière sombre, théorie F(R) et transformation de Lorentz à l’échelle macroscopique [texte imprimé] / Amine Benachour, Auteur ; Sami Ryad Zouzou, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 98 f. ; 30 cm.
2 copies imprimées disponibles

Langues : Français (fre)

Catégories :	Français - Anglais Physique
Tags :	Einstein-Cartan theory  Spherical symmetry  Exact solutions  Mass formula  Dark matter  f(R) theory  Ricci scalar  Common solutions  Lorentz transformation  Length contraction  Thought experiment  Tape measure  Simultaneity  Macroscopic scale  Théorie d’Einstein-Cartan  Symétrie sphérique  Solutions exactes  Formule de masse  Matière sombre  Théorie f(R)  Scalaire de Ricci  Solutions communes  Transformation de Lorentz  Contraction des longueurs  Expérience de pensée  Mètre ruban  Simultanéité  Echelle macroscopique  نظرية أينشتاين كارتن  تناظر كروي  حلول المعادلات  قانون الكتلة  المادة المظلمة  نظرية f(R)  ثابت الانحناء  حلول مشتركة  تحويل لورنز  تقلص الأطوال  تجربة فكرية  شريط قياس  تزامن  مقياس عيانى
Index. décimale :	530 Physique
Résumé :	Some current issues in cosmology lead us to consider theories of gravitation other than general relativity. It is in this context that this thesis is being taken by considering first the Einstein-Cartan theory for static and spherically symmetric spacetime where obtaining exact solutions has led to a general formula linking the internal mass of an object with spherical symmetry to its external mass, highlighting a difference in mass that would likely to provide an explanation for the dark matter problem in the universe. Another theory of gravitation which has been studied in this thesis often proposed as an alternative to the problem of dark energy; is the f(R) theory where the emphasis has been placed on its close link with general relativity by demonstrating the necessary and sufficient condition for a metric to be a solution of the two theories; whose consequences made possible the construction of f(R) theories equivalent to general relativity for a specific form of the Ricci scalar; and set the conditions on the parameters of a given model to have such equivalence. Finally, following the analysis of a thought experiment involving the measurement of the distance between two observers in motion by a tape measure, certain problems related to the application of the Lorentz transformation at the macroscopic scale have also been investigated and solved.
Diplôme :	Doctorat en sciences
En ligne :	../theses/physique/BEN7376.pdf
Format de la ressource électronique :	pdf
Permalink :	index.php?lvl=notice_display&id=11025