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Study of Varying Speed of Light Cosmology as an Alternative to Inflationary Cosmology

Dehgani, Hossein | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42307 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Golshani, Mehdi
  7. Abstract:
  8. Inflationary Cosmology is the prevailing paradigm of Early Universe Cosmology. In these models, by considering that in the first moments after the Big Bang, there has been a scalar field which has dominated the energy of the universe, we can create a an era called inflation in which the scale factor has a positive acceleration. By such an era, we can solve some of the problems of the Standard Big Bang (SBB) theory such as the horizon problem and the flatness problem, which are in relation with the initial conditions. In addition, this paradigm creates a suitable context for explaining the creation of the inhomogeneities in the universe. Therefore, these models have a predictability feature which can be tested by investigating the thermal inhomogeneity of the Cosmic Microwave Background (CMB). Although the predictions of these models have been consistent with experimental data so far, these models need more evidences so as to be proved as a part of the Standard Cosmology. However, this paradigm is not the only idea which can solve the problems of the SBB theory. In the recent years there have been other models which seem to have the same ability. In this thesis we study one of these models which is called Varying Speed of Light Cosmology. In this theory we consider that the speed of light has been much longer in the early universe and by this we can explain the deficiencies of the SBB theory
  9. Keywords:
  10. Inflationary Cosmology ; Inflation Problems ; Alternative Models ; Varying Speed of Light

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