Aspects of multimetric gravity

3Quantum: Algebra Geometry Information

物理学;数学

Hohmann, M.^1

Teoreetilise Füüsika Labor, Füüsika Instituut, Tartu Ülikool, Ravila 4c, Tartu

50411, Estonia^1

关键词: Expansion of the universe;    Gravity theory;    Metric tensor;    Newtonians;    Standard model;    Structure formations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/532/1/012009/pdf
DOI  :  10.1088/1742-6596/532/1/012009

来源: IOP

【 摘 要 】

We present a class of gravity theories containing N ≥ 2 metric tensors and a corresponding number of standard model copies. In the Newtonian limit gravity is attractive within each standard model copy, but different standard model copies mutually repel each other. We discuss several aspects of these multimetric gravity theories, including cosmology, structure formation, the post-Newtonian limit and gravitational waves. The most interesting feature we find is an accelerating expansion of the universe that naturally becomes small at late times.