Work

Asymptotically free mimetic gravity

Year: 2019

Type: article

Abstract: The idea of “asymptotically free” gravity is implemented using a constrained mimetic scalar field. The effective gravitational constant is assumed to vanish at some limiting curvature. As a result singularities in spatially flat Friedmann and Kasner universes are avoided. Instead, the solutions in both cases approach a de Sitter metric with limiting curvature. We show that quantum metric fluctuations vanish when this limiting curvature is approached.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-019-7075-y

Authors: Ali H. Chamseddine, Viatcheslav Mukhanov, Tobias B. Russ

Institutions: Radboud University Nijmegen, American University of Beirut, Korea Institute for Advanced Study, Max Planck Institute for Physics, Ludwig-Maximilians-Universität München

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, Deutsche Forschungsgemeinschaft

Awards: G1768993395, Quanta of Geometry, EXC 2111: Munich Center for Quantum Science and Technology (MCQST)