Essays about: "bigravity"

Found 2 essays containing the word bigravity.

  1. 1. On the consistency of multigravity theories

    University essay from Stockholms universitet/Fysikum

    Author : Marcus Högås; [2016]
    Keywords : Gravity; Modified theories for gravity; Bimetric gravity; Multimetric gravity; Bigravity; Multigravity; Consistency; Deser-van Nieuwenhuizen condition; Symmetric vielbein condition; Symmetrization condition;

    Abstract : In this thesis a set of recently proposed multigravity theories is analysed. In the special case of bimetric gravity, the theory has been conclusively shown to be ghost-free. On the other hand, for multigravity theories in general, the ghost-issue has not been settled conclusively. READ MORE

  3. 2. The Square-Root Isometry of Coupled Quadratic Spaces : On the relation between vielbein and metric formulations of spin-2 interactions

    University essay from Stockholms universitet/Fysikum; Stockholms universitet/Oskar Klein-centrum för kosmopartikelfysik (OKC)

    Author : Kocic Mikica B.; [2014]
    Keywords : modified gravity; bigravity; bimetric theory; square-root isometry;

    Abstract : Bimetric theory is an extension to general relativity that introduces a secondary symmetric rank-two tensor field. This secondary spin-2 field is also dynamical, and to avoid the Boulware-Deser ghost issue, the interaction between the two fields is obtained through a potential that involes the matrix square-root of the tensors. READ MORE