Energy conditions in $f(Q, L_m)$ gravity
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917977370132480 |
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| author | Myrzakulov, Y. Donmez, O. Koussour, M. Muminov, S. Ostemir, D. Rayimbaev, J. |
| author_facet | Myrzakulov, Y. Donmez, O. Koussour, M. Muminov, S. Ostemir, D. Rayimbaev, J. |
| contents | We are experiencing a golden age of experimental cosmology, with exact and accurate observations being used to constrain various gravitational theories like never before. Alongside these advancements, energy conditions play a crucial theoretical role in evaluating and refining new proposals in gravitational physics. We investigate the energy conditions (WEC, NEC, DEC, and SEC) for two $f(Q, L_m)$ gravity models using the FLRW metric in a flat geometry. Model 1, $f(Q, L_m) = -αQ + 2L_m + β$, features linear parameter dependence, satisfying most energy conditions while selectively violating the SEC to explain cosmic acceleration. The EoS parameter transitions between quintessence, a cosmological constant, and phantom energy, depending on $α$ and $β$. Model 2, $f(Q, L_m) = -αQ + λ(2L_m)^2 + β$, introduces nonlinearities, ensuring stronger SEC violations and capturing complex dynamics like dark energy transitions. While Model 1 excels in simplicity, Model 2's robustness makes it ideal for accelerated expansion scenarios, highlighting the potential of $f(Q, L_m)$ gravity in explaining cosmic phenomena. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03855 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Energy conditions in $f(Q, L_m)$ gravity Myrzakulov, Y. Donmez, O. Koussour, M. Muminov, S. Ostemir, D. Rayimbaev, J. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology We are experiencing a golden age of experimental cosmology, with exact and accurate observations being used to constrain various gravitational theories like never before. Alongside these advancements, energy conditions play a crucial theoretical role in evaluating and refining new proposals in gravitational physics. We investigate the energy conditions (WEC, NEC, DEC, and SEC) for two $f(Q, L_m)$ gravity models using the FLRW metric in a flat geometry. Model 1, $f(Q, L_m) = -αQ + 2L_m + β$, features linear parameter dependence, satisfying most energy conditions while selectively violating the SEC to explain cosmic acceleration. The EoS parameter transitions between quintessence, a cosmological constant, and phantom energy, depending on $α$ and $β$. Model 2, $f(Q, L_m) = -αQ + λ(2L_m)^2 + β$, introduces nonlinearities, ensuring stronger SEC violations and capturing complex dynamics like dark energy transitions. While Model 1 excels in simplicity, Model 2's robustness makes it ideal for accelerated expansion scenarios, highlighting the potential of $f(Q, L_m)$ gravity in explaining cosmic phenomena. |
| title | Energy conditions in $f(Q, L_m)$ gravity |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2504.03855 |