Primordial black hole driven cosmic acceleration
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909917722443776 |
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| author | Dialektopoulos, Konstantinos Papanikolaou, Theodoros Zarikas, Vasilios |
| author_facet | Dialektopoulos, Konstantinos Papanikolaou, Theodoros Zarikas, Vasilios |
| contents | We propose a natural mechanism for cosmic acceleration driven by primordial black holes (PBHs) with repulsive behavior, within a ''Swiss Cheese'' cosmological framework. Considering regular black hole spacetimes such as Hayward, Bardeen, and Dymnikova-as well as the singular Schwarzschild-de Sitter case-we consistently find a robust PBH-driven cosmic acceleration phase. This phase ends either at an energy scale set by the PBH parameters or through black hole evaporation. Notably, one finds that ultra-light PBHs with $m < 5 \times 10^8 \, {\rm g}$ can trigger exponential inflation with graceful exit and reheating. Additionally, PBHs with $m \sim 10^{12} \, {\rm g}$ and abundances $0.107 < Ω_{\rm PBH}^{\rm eq} < 0.5$ near matter-radiation equality can act as an early dark energy component, offering a potential resolution to the Hubble tension. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_18080 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Primordial black hole driven cosmic acceleration Dialektopoulos, Konstantinos Papanikolaou, Theodoros Zarikas, Vasilios General Relativity and Quantum Cosmology We propose a natural mechanism for cosmic acceleration driven by primordial black holes (PBHs) with repulsive behavior, within a ''Swiss Cheese'' cosmological framework. Considering regular black hole spacetimes such as Hayward, Bardeen, and Dymnikova-as well as the singular Schwarzschild-de Sitter case-we consistently find a robust PBH-driven cosmic acceleration phase. This phase ends either at an energy scale set by the PBH parameters or through black hole evaporation. Notably, one finds that ultra-light PBHs with $m < 5 \times 10^8 \, {\rm g}$ can trigger exponential inflation with graceful exit and reheating. Additionally, PBHs with $m \sim 10^{12} \, {\rm g}$ and abundances $0.107 < Ω_{\rm PBH}^{\rm eq} < 0.5$ near matter-radiation equality can act as an early dark energy component, offering a potential resolution to the Hubble tension. |
| title | Primordial black hole driven cosmic acceleration |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2511.18080 |