14501

13086

كارشناسي ارشد

ذرات بنيادي و نظريه ميدان ها

اصفهان : دانشگاه صنعتي اصفهان

1397

هشت، 69ص.: مصور

1398/01/21

كتابنامه

فيزيك

فيزيك

1398/01/27

ID13086

Dynamical structure of the action of general relativity and bi gravity in the framework of the vierbein variables and ADM formalism Mohammadjavad Vasli masuleh January 12 2019 Department of Physics Isfahan University of Technology Isfahan 84156 83111 Iran University Code IUT 77142 Degree M S c Language Farsi supervisor Dr Ahmad Shirzad Abstract After the precise confirmation of the accelerated expansion of the universe in 1998 extensive efforts were made to describe this phenomenon One of these efforts was the massive gravity theory The theory of massive gravity has a long history but a large part of its develpment has happened in the last decade One of the most important theories of massive gravity is the bi gravity theory that was proposed by Fouad Hassan and Rachel Rosen in 2012 Since somehow the square root of the metric exists in the action of this theory calculation will be complicated To solve this problem vierbein formulation is used Since vierbein acts as the square root of the metric the calculation will be simpler Furthermore in this formalism it is possible that the bi gravity theory be extended to multi gravity theory Since a large part of this theory is similar to the action of general relativity we will begin by analyzing this action In the next step We will rewrite the bi gravity theory in the vierbein formalism Then with the help of the ADM method we will calculate the Hamiltonian of this theory and its constraint structure Keywords bi gravity vielbein ADM formulation General Relativity hamiltonian analysis

احمد شيرزاد

بهروز ميرزا

ممتحن مدعو: صديقه سجاديان; ممتحن داخلي: مسلم زارعي