The Cosmological Constant Problem

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Nassiri Rad, Amin | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48822 (04)
University: Sharif University of Technology
Department: physics
Advisor(s): Golshani, Mehdi; Abolhassani, Ali Akbar
Abstract:
In 1917 Einstein used Λ as a cosmological constant in his theory of general relativity, but after a while he receded for some reasons. This constant has been reconsidered again recently. But using it in general relativity has caused some problems. In this thesis, after a short review of important elements in studying cosmological constant problem, like a short introduction to general relativity and cosmology in the first chapter as well as a short review of quantum field theory and supersymmetry in the second chapter, we will study the history and introduction of the problem in the third chapter.in the third chapter , different solutions to this problem ,like supersymmetry,anthropic principle, scale invariance and finally massive gravity will be considered and assessed. Modified gravity as a different approach will be studied too.Finally ,a cosmology with non-zero cosmological constant will be studied in the last chapter
Keywords:
Cosmological Constant ; General Relativity Theory ; Dark Energy

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