Evolving Dark Energy or Evolving Dark Matter?
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866913949280108544 |
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| author | Chen, Xingang Loeb, Abraham |
| author_facet | Chen, Xingang Loeb, Abraham |
| contents | We show that the latest empirical constraints on cosmology, from a combination of DESI, CMB and supernova data, can be accounted for if a small component of dark matter has an evolving and oscillating equation of state within $-1<w<1$. From a fundamental physics perspective, this interpretation is more appealing than an evolving phantom dark energy with $w<-1$, which violates the null energy condition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_02645 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Evolving Dark Energy or Evolving Dark Matter? Chen, Xingang Loeb, Abraham Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory We show that the latest empirical constraints on cosmology, from a combination of DESI, CMB and supernova data, can be accounted for if a small component of dark matter has an evolving and oscillating equation of state within $-1<w<1$. From a fundamental physics perspective, this interpretation is more appealing than an evolving phantom dark energy with $w<-1$, which violates the null energy condition. |
| title | Evolving Dark Energy or Evolving Dark Matter? |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2505.02645 |