Exploring and Constraining Alternative Theories of Gravity
A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Gravitation".
Deadline for manuscript submissions: 30 January 2026 | Viewed by 7
Special Issue Editors
Interests: gravitation; cosmology; alternative theories of gravity; inflation; gravitational waves; black holes; compact objects
Interests: black holes; singularities; quantum fields in curved space-time; inflation; modified gravity; Palatini formalism; stellar structure models; compact objects
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Special Issue Information
Dear Colleagues,
Unraveling the true nature of gravity is one of the most exciting challenges of our time. Despite the well-known success of Einstein’s Theory of General Relativity, there are some conundrums, including the absence of a fully consistent quantum extension, the need for dark matter and dark energy, the existence of singularities, and the cosmological constant problem. Therefore, alternative scenarios have been proposed in the literature, both extending Einstein’s gravity and replacing it with different descriptions. Fortunately, we live in a multimessenger era, with astrophysical, cosmological, and experimental data from distinct but complementary approaches and sources. These data allow us to constrain alternative theories of gravity and move a step closer to unveiling the nature of gravity.
We are pleased to invite you to submit original research work, reviews, and communications addressing alternative gravity models and theoretical or observational constraints. Predictions of future scientific challenges or new detection methods are also encouraged.
We look forward to receiving your contributions.
Yours faithfully,
Dr. Cláudio Gomes
Dr. Gonzalo J. Olmo
Guest Editors
Manuscript Submission Information
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Keywords
- gravitation
- cosmology
- modified theories of gravity
- scalar–vector–tensor theories
- torsion and non-metricity
- higher-order theories
- models beyond the standard model of particle physics
- quantum gravity
- inflationary universe
- gravitational wave universe
- dark universe
- observational constraints
- ground- and space-based missions
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