| 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 : |
index.php?lvl=notice_display&id=10120 |
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Etude théorique et applications en calcul quantique entanglement et decoherence
