What is it about?
General Relativity attributes gravity to the curvature of space-time. This geometric interpretation of gravity can be extended by allowing space-time to twist as well as curve. In our work, we look at novel models of gravity within this broader geometric framework and show that the twisting of space-time can lead to cosmic inflation in the early Universe.
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Why is it important?
Einstein's 1915 general theory of relativity (GR) was a revolutionary theory that reshaped our fundamental understanding of space, time and the gravitational interaction. Nevertheless, there is evidence indicating that GR may not represent the final theory of gravity. In our research, we demonstrate that these new theories of gravity offer a possible explanation for the inflationary expansion during the early universe, while also resolving the cosmological singularity inherent in GR.
Perspectives
This paper was very fun to work on, and we managed to uncover some unexpected results relating to cosmological inflation and singularities. We hope that these new types of gravitational theories could help to solve some of the longstanding problems in theoretical physics and cosmology in the future.
Erik Jensko
University College London
Read the Original
This page is a summary of: Modified gravity: A unified approach to metric-affine models, Journal of Mathematical Physics, August 2023, American Institute of Physics,
DOI: 10.1063/5.0150038.
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