Speaker
Description
Despite its great success, the general theory of relativity is not the final theory of gravity. In addition to other problems, some shortcomings of the standard model of cosmology led to the search for a more general theory of gravity. One of the promising lines of research is the nonlocal theory of gravity. In this talk, I will present a simple nonlocal de Sitter gravity, its several exact vacuum cosmological solutions and an approximate solution for describing the rotation curves of spiral galaxies. One of cosmological solutions mimics effects that are usually assigned to dark matter and dark energy. Some other cosmological solutions are examples of the bounce and cyclic universes. The rotation curves of the Milky Way and M33 spiral galaxy, as well as some other aspects, will be also presented.
Based mainly on joint work with I. Dimitrijevic, Z. Rakic and J. Stankovic:
- PLB 797 (2019) 134848, arXiv:1906.07560 [gr-qc].
- JHEP 12 (2022) 054, arXiv:2206.13515 [gr-qc].
- Symmetry 16 (2024) 544, arXiv:2404.05848 [physics.gen-ph].
