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Auteur Mohamed Taha Rouabah |
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Affiner la recherche Interroger des sources externesEffets de cohérence en diffusion multiple de la lumière et intrication des états cohérents / Mohamed Taha Rouabah
Titre : Effets de cohérence en diffusion multiple de la lumière et intrication des états cohérents Type de document : texte imprimé Auteurs : Mohamed Taha Rouabah, Auteur ; Noureddine Mebarki, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 187 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Physique théorique Optique quantique Effets cooperatifs Atomes froids Intrication quantique Etats cohérents Diffusion de la lumière Quantum optics Cooperative effects Cold atoms Quantum entanglement Coherent states Light scattering الضوئيات الكمية تبعثر الصوء الظواهر الجماعية الذرات الباردة التشابك الكمي الحالات المتسقة Index. décimale : 530 Physique Résumé : This work is devoted on the one hand to the investigation of coherence effects in multiple scattering of light by an atomic cloud and on the other hand to the entanglement of a deformed coherent states.
The interaction b etween light and a dilute disordered atomic cloud gives rise to collective coherent effects due to the interaction of the induced dip oles via the external field. The behavior of such coherent effects in multiple scattering regime is an important question for various physical systems. We present two theoretical models describing those coherence effects in different scattering regimes. The
scattering order expansion treatment of light scattering allows us to highlight the role of the first and second scattering orders as well as the interference between the resulting scattered fields. In the multiple scattering regime we show that the radiation pressure force is not a good observable to probe cooperative effects. Furthermore, we discover a surprising phase coherence that hints that collective effects may survive in multiple scattering regime. That could be due to a synchronization between the induced atomic dipoles.
In a second part, we study the effect of an algebra deformation on entangled coherent states. Such an approach allows to describe decoherence in perturbed entangled quantum systems. We construct a deformed coherent states and calculate their concurrence. We show that algebra deformation could have a non negligible impact on bipartite entangled coherent states if those later are not maximally entangled.
Diplôme : Doctorat En ligne : ../theses/physique/ROU6708.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9915 Effets de cohérence en diffusion multiple de la lumière et intrication des états cohérents [texte imprimé] / Mohamed Taha Rouabah, Auteur ; Noureddine Mebarki, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 187 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Physique théorique Optique quantique Effets cooperatifs Atomes froids Intrication quantique Etats cohérents Diffusion de la lumière Quantum optics Cooperative effects Cold atoms Quantum entanglement Coherent states Light scattering الضوئيات الكمية تبعثر الصوء الظواهر الجماعية الذرات الباردة التشابك الكمي الحالات المتسقة Index. décimale : 530 Physique Résumé : This work is devoted on the one hand to the investigation of coherence effects in multiple scattering of light by an atomic cloud and on the other hand to the entanglement of a deformed coherent states.
The interaction b etween light and a dilute disordered atomic cloud gives rise to collective coherent effects due to the interaction of the induced dip oles via the external field. The behavior of such coherent effects in multiple scattering regime is an important question for various physical systems. We present two theoretical models describing those coherence effects in different scattering regimes. The
scattering order expansion treatment of light scattering allows us to highlight the role of the first and second scattering orders as well as the interference between the resulting scattered fields. In the multiple scattering regime we show that the radiation pressure force is not a good observable to probe cooperative effects. Furthermore, we discover a surprising phase coherence that hints that collective effects may survive in multiple scattering regime. That could be due to a synchronization between the induced atomic dipoles.
In a second part, we study the effect of an algebra deformation on entangled coherent states. Such an approach allows to describe decoherence in perturbed entangled quantum systems. We construct a deformed coherent states and calculate their concurrence. We show that algebra deformation could have a non negligible impact on bipartite entangled coherent states if those later are not maximally entangled.
Diplôme : Doctorat En ligne : ../theses/physique/ROU6708.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9915 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ROU/6708 ROU/6708 Thèse Bibliothèque principale Thèses Disponible
