Titre :	Etude théorique et applications en calcul quantique entanglement et decoherence
Type de document :	texte imprimé
Auteurs :	Mohamed Farouk Ghiti, Auteur ; Noureddine Mebarki, Directeur de thèse
Editeur :	جامعة الإخوة منتوري قسنطينة
Année de publication :	2015
Importance :	95 f.
Format :	30 cm.
Note générale :	2copie imprimes disponibles
Langues :	Français (fre)
Catégories :	Français - Anglais Physique
Tags :	physique théorique  Information quantique  Intrication quantique  Théorie Paraquantique  Concurrence  Géométrie Non Commutative  Entropie de Von Neumann  Quantum Information  Quantum Entanglement  Paraquantum Theory  Noncommutative Geometry  Von Neumann entropy  المعلوماتية الكوانتية  التشابك الكوانتي  نظرية التكميم المعمم  المنافسة  الهندسة الاتبديلية  الانتروبي.
Index. décimale :	530 Physique
Résumé :	In this thesis we have studied a quantum phenomenon called quantum entanglement in different contexts. The mathematical formalism of paraquantum theory has been used to derive the even and odd paraquantum coherent states. We have used the concurrence to measure the bipartite entanglement of paraquantum coherent state. The behavior of the concurrence in function of the paraquantization parameter c and the coherence parameter � has been studied and analyzed. It is shown that the paraquantisation has an inverse relation with the bipartite quantum entanglement. In the second context we have studied the quantum entanglement in noncommutative Bianchi I space-time. In the first step, we have studied the pair creation mechanism. First of all, we have derived the noncommutative Dirac equation and differentiate between positive and negative modes. Then, we have calculated the fermions-antifermions pair creation density using the Bogoliubov coefficients. To measure the modes entanglement we have used the Von Neumann entropy S!.! . The behavior of S!.! in function of noncommutativity θ parameter and k!-modes frequencies has been presented. It is shown that the noncommutativity plays an important role and it has a direct effect on quantum entanglement, such that in a region it plays the role of gravity and in another region it behaves like a repulsive force. The results and discussions of variations of S!.! with respect to the behaviors of noncommutativity have been presented.
Diplôme :	Doctorat
En ligne :	../theses/physique/GHI6828.pdf
Format de la ressource électronique :	pdf
Permalink :	https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10120

Etude théorique et applications en calcul quantique entanglement et decoherence [texte imprimé] / Mohamed Farouk Ghiti, Auteur ; Noureddine Mebarki, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 95 f. ; 30 cm.
2copie imprimes disponibles
Langues : Français (fre)

Catégories :	Français - Anglais Physique
Tags :	physique théorique  Information quantique  Intrication quantique  Théorie Paraquantique  Concurrence  Géométrie Non Commutative  Entropie de Von Neumann  Quantum Information  Quantum Entanglement  Paraquantum Theory  Noncommutative Geometry  Von Neumann entropy  المعلوماتية الكوانتية  التشابك الكوانتي  نظرية التكميم المعمم  المنافسة  الهندسة الاتبديلية  الانتروبي.
Index. décimale :	530 Physique
Résumé :	In this thesis we have studied a quantum phenomenon called quantum entanglement in different contexts. The mathematical formalism of paraquantum theory has been used to derive the even and odd paraquantum coherent states. We have used the concurrence to measure the bipartite entanglement of paraquantum coherent state. The behavior of the concurrence in function of the paraquantization parameter c and the coherence parameter � has been studied and analyzed. It is shown that the paraquantisation has an inverse relation with the bipartite quantum entanglement. In the second context we have studied the quantum entanglement in noncommutative Bianchi I space-time. In the first step, we have studied the pair creation mechanism. First of all, we have derived the noncommutative Dirac equation and differentiate between positive and negative modes. Then, we have calculated the fermions-antifermions pair creation density using the Bogoliubov coefficients. To measure the modes entanglement we have used the Von Neumann entropy S!.! . The behavior of S!.! in function of noncommutativity θ parameter and k!-modes frequencies has been presented. It is shown that the noncommutativity plays an important role and it has a direct effect on quantum entanglement, such that in a region it plays the role of gravity and in another region it behaves like a repulsive force. The results and discussions of variations of S!.! with respect to the behaviors of noncommutativity have been presented.
Diplôme :	Doctorat
En ligne :	../theses/physique/GHI6828.pdf
Format de la ressource électronique :	pdf
Permalink :	https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10120