Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Extra time-like dimensions(Izmir Institute of Technology, 2006) Ün, Cem Salih; Erdem, RecaiThe current status of extra dimensions in high energy physics with particular emphasis on extra time-like dimensions is briefly reviewed. Some of the phenomenological problems related to the use of extra time-like dimensions that mentioned in the literature are reconsidered. It is found that the use of extra time-like dimensions is less problematic than it was previously thought.Master Thesis Dark Energy Mechanisms in the Context of Extra Dimensional Models(Izmir Institute of Technology, 2011) Yağmurcukardeş, Mehmet; Erdem, RecaiDark energy is the simplest and the most standart explanation to account for the observed accelerated expansion of the universe. In this thesis we use the term 'dark energy' in its standart meaning i.e. a field or fluid that is responsible for the cosmic acceleration in the frame work of general relativity. Meanwhile extra dimensions is an attractive framework to understand many otherwise unexplained physical phenomena in a clear, simple formulation. Therefore the study of extra dimensional cosmological models is an attractive area of study. In this thesis we have considered viability of extra dimensional cosmological models in the light of the accelerated expansion of the universe. We have confirmed the results of studies that have shown the incompatibility of a broad class of extra dimensional cosmological models with a dark energy of an equation of state close to that of cosmological constant. We have discussed also possible theoritical and vational ways to avoid the no-go theorems for extra dimensional cosmological models as well.Master Thesis Solitonic Solutions and Particle Localization in Higher Dimensional Spaces(Izmir Institute of Technology, 2003) Erman, Fatih; Erdem, RecaiFirst the basic extra dimensional theory (i.e. Kaluza-Klein theory) and the main aspects of solitons are reviewed. Then the current status of extra dimen-sional models and the application of solitons (especially kinks) in this context are studied. The extra dimensional models for fermion localization are considered with a particular emphasis. Finally a variation of these models which tries to in-corporate the best aspects of various models for fermion localization is presented.