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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.14174 |
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| _version_ | 1866914042979811328 |
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| author | De, Avik Paliathanasis, Andronikos |
| author_facet | De, Avik Paliathanasis, Andronikos |
| contents | We study exact cosmological solutions in $f(Q)$ gravity formulated beyond the coincident gauge, focusing on the non-coincident connection branch $Γ_B$. Using a minisuperspace approach, the field equations are recast into an equivalent scalar-tensor form, enabling analytic reconstruction of cosmological models. We obtain exact solutions of particular interest, including de Sitter, scaling, $Λ$CDM, Chaplygin gas, generalized Chaplygin gas, and CPL parameterizations. The corresponding scalar potentials and $f(Q)$ functions are derived in closed or parametric form. Our analysis shows that non-coincident $f(Q)$ gravity admits a richer solution space than the coincident case and can describe both early-time inflationary dynamics and late-time acceleration within a unified framework. These results open new directions for testing $f(Q)$ cosmology against observations and exploring its role as a viable alternative to $Λ$CDM. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_14174 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exact cosmological solutions in non-coincidence $f(Q)$-theory De, Avik Paliathanasis, Andronikos General Relativity and Quantum Cosmology We study exact cosmological solutions in $f(Q)$ gravity formulated beyond the coincident gauge, focusing on the non-coincident connection branch $Γ_B$. Using a minisuperspace approach, the field equations are recast into an equivalent scalar-tensor form, enabling analytic reconstruction of cosmological models. We obtain exact solutions of particular interest, including de Sitter, scaling, $Λ$CDM, Chaplygin gas, generalized Chaplygin gas, and CPL parameterizations. The corresponding scalar potentials and $f(Q)$ functions are derived in closed or parametric form. Our analysis shows that non-coincident $f(Q)$ gravity admits a richer solution space than the coincident case and can describe both early-time inflationary dynamics and late-time acceleration within a unified framework. These results open new directions for testing $f(Q)$ cosmology against observations and exploring its role as a viable alternative to $Λ$CDM. |
| title | Exact cosmological solutions in non-coincidence $f(Q)$-theory |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2509.14174 |