Modified gravity at large scales on quantum spacetime in the IKKT model
Abstract
A bstract The gravitational dynamics of 3+1 dimensional covariant quantum spacetime in the IKKT or IIB matrix model is studied at one loop, combining the Yang-Mills-type matrix action with the induced Einstein-Hilbert action. This combined action leads to interesting modifications of the gravitational dynamics at long distances, governed by modified Einstein equations including an extra geometrical tensor interpreted as “mirage matter”. In particular we find extra non — Ricci flat geometric modes with a non-standard dispersion relation, with features reminiscent of dark matter.
Fields of Study & Subjects
Noncommutative and Quantum Gravity Theories
Black Holes and Theoretical Physics
Cosmology and Gravitation Theories
Publication details
- Journal / source
- Journal of High Energy Physics
- Publisher
- Springer Science and Business Media LLC
- Volume
- 2026
- Issue
- 4
- Publication date
- 3 April 2026
- Language
- EN