Cosmology of Metric-Affine $R + βR^2$ Gravity with Pure Shear Hypermomentum
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2022
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| _version_ | 1866929327650635776 |
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| author | Iosifidis, Damianos Myrzakulov, Ratbay Ravera, Lucrezia |
| author_facet | Iosifidis, Damianos Myrzakulov, Ratbay Ravera, Lucrezia |
| contents | In this paper we study the cosmological aspects of metric-affine $f(R)$ gravity with hyperfluid. The equations of motion of the theory are obtained by varying the action with respect to the metric and the independent connection. Subsequently, considering a Friedmann-Lemaître-Robertson-Walker background, we derive the modified Friedmann equations in the presence of a perfect cosmological hyperfluid. Especially, we focus on the particular case in which $f(R)=R+βR^2$, considering purely shear hypermomentum and finding exact solutions in the weak coupling limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_00669 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Cosmology of Metric-Affine $R + βR^2$ Gravity with Pure Shear Hypermomentum Iosifidis, Damianos Myrzakulov, Ratbay Ravera, Lucrezia General Relativity and Quantum Cosmology High Energy Physics - Theory In this paper we study the cosmological aspects of metric-affine $f(R)$ gravity with hyperfluid. The equations of motion of the theory are obtained by varying the action with respect to the metric and the independent connection. Subsequently, considering a Friedmann-Lemaître-Robertson-Walker background, we derive the modified Friedmann equations in the presence of a perfect cosmological hyperfluid. Especially, we focus on the particular case in which $f(R)=R+βR^2$, considering purely shear hypermomentum and finding exact solutions in the weak coupling limit. |
| title | Cosmology of Metric-Affine $R + βR^2$ Gravity with Pure Shear Hypermomentum |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2301.00669 |