Unification of Conformal and Fuzzy Gravities with Internal Interactions—Study of Their Behaviour at Low Energies and Possible Signals in the Detection of Gravitational Waves
In this work, we develop a unified framework for Conformal Gravity and Noncommutative (Fuzzy) Gravity incorporating internal interactions. Our approach relies on two fundamental observations: first, the dimensions of a curved manifold and those of its tangent group need not coincide, and second, both gravitational models can be formulated as gauge theories. We begin with a discussion of the gauge-theoretic formulation of gravitational dynamics, emphasizing the role of diffeomorphism invariance. We then outline the constructions of Conformal Gravity and Fuzzy Gravity within this formalism. Building on an extension of the four-dimensional tangent group, we propose a scheme that unifies the two theories while naturally incorporating internal degrees of freedom. We further investigate the low-energy limits that emerge after appropriate spontaneous symmetry-breaking mechanisms, and we comment on potential observational signatures—particularly those associated with cosmic strings and their imprint on gravitational-wave spectra.
Authors
- Danai Roumelioti (ORCID: https://orcid.org/0000-0002-7895-300X)
- Stelios Stefas (ORCID: https://orcid.org/0000-0001-5097-4899)
- George Zoupanos (ORCID: https://orcid.org/0000-0002-9262-7884)
- Gregory Patellis (ORCID: https://orcid.org/0000-0002-5053-3994)
Institutions
- Max Planck Society (DE)
- Universität Hamburg (DE)
- National Technical University of Athens (GR)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Max Planck Institute for Physics (DE)
Publication Details
- Journal
- Symmetry
- Published
- 2025-12-02
- DOI
- https://doi.org/10.3390/sym17122055
- Primary Topic
- Noncommutative and Quantum Gravity Theories
- Type
- article
- Field-Weighted Citation Impact
- 0.00