A class of ghost-free theories in symmetric teleparallel geometry
Antonio G. Bello-Morales, Jose Beltrán Jiménez, Alejandro Jiménez-Cano, Tomi Koivisto, Antonio L. Maroto
Abstract
A bstract Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of some symmetries. In this work, we construct a class of ghost-free theories based on a symmetry under Transverse Diffeomorphisms that is naturally realised in symmetric teleparallelism. We explicitly show their equivalence to a family of theories with an extra scalar field plus a global degree of freedom and how Horndeski theories and healthy couplings to matter fields can be readily accommodated.
Topics & Concepts
PhysicsClass (philosophy)GeometryTheoretical physicsMathematical physicsClassical mechanicsArtificial intelligenceMathematicsComputer scienceBlack Holes and Theoretical PhysicsAdvanced Differential Geometry ResearchCosmology and Gravitation Theories