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Author  |
Artola, M.; Ayuso, I.; Lazkoz, R.; Olmo, G.; Salzano, V. |
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Title |
Geometric acceleration in f (Q, C) theories |
Type |
Journal Article |
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Year |
2025 |
Publication |
Physics of the Dark Universe |
Abbreviated Journal |
Phys. Dark Universe |
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Volume |
50 |
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Pages |
102180 - 6pp |
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Keywords |
Mofied theories of gravity; Non-metricity; Dark energy models; Observational constraints |
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Abstract |
The f(Q,C) framework of gravity enables the depiction of an effective dark energy fluid that emerges from geometry itself, thus leading to modifications in the cosmological phenomenology of General Relativity. We pursue this approach to discover new and observationally supported (effective) evolving dark energy models. We propose a general f (Q, C) formulation that cannot be simply split into separate functions of Q and C, yet it still results in second-order field equations. By employing a particular type of connection, we derive guidelines for new cosmological models, including a variant of the DGP model that appears to be statistically favored over Lambda CDM. Notably, we also demonstrate how to translate solutions within this f (Q, C) framework to f (Q) counterparts at the background level. |
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Address |
[Artola, Mikel; Ayuso, Ismael; Lazkoz, Ruth] Univ Basque Country, Dept Phys, Leioa 48940, Spain, Email: mikel.artola@ehu.eus; |
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Publisher |
Elsevier |
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English |
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Notes |
WOS:001631722400003 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6968 |
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