Redshift-dependent Distance Duality Violation in Resolving Multidimensional Cosmic Tensions
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912686925676544 |
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| author | Zhou, Zhihuan Miao, Zhuang Zhang, Rong Yang, Hanbing Fu, Penghao Ai, Chaoqian |
| author_facet | Zhou, Zhihuan Miao, Zhuang Zhang, Rong Yang, Hanbing Fu, Penghao Ai, Chaoqian |
| contents | In this work, we investigate whether violations of the distance-duality relation (DDR) can resolve the multidimensional cosmic tensions characterized by the $H_0$ and $S_8$ discrepancies. Using the Fisher-bias formalism, we reconstruct minimal, data-driven $η(z)$ profiles that capture the late-time deviations required to reconcile early- and late-Universe calibrations. While a constant DDR offset preserves the Pantheon-inferred matter density $Ω_m = 0.334 \pm 0.018$--leaving its inconsistency with the Planck best-fit $Λ$CDM model and weak-lensing surveys unresolved--a time-varying DDR substantially reduces cross-dataset inconsistencies and improves the global fit, yielding $Δχ^2 \simeq -10$ relative to $Λ$CDM when the SH0ES prior is excluded. This result suggests that the $Ω_m$ discrepancy may represent indirect evidence for a time-varying DDR. A hybrid scenario combining a time-dependent DDR with a phantom-like dark energy transition achieves the most consistent global reconciliation, reducing the tension with DES-Y3 measurements to below $2σ$. These findings indicate that a mild DDR violation, coupled with evolving dark energy, offers a coherent pathway toward jointly addressing the $H_0$ and $S_8$ tensions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_02357 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Redshift-dependent Distance Duality Violation in Resolving Multidimensional Cosmic Tensions Zhou, Zhihuan Miao, Zhuang Zhang, Rong Yang, Hanbing Fu, Penghao Ai, Chaoqian Cosmology and Nongalactic Astrophysics In this work, we investigate whether violations of the distance-duality relation (DDR) can resolve the multidimensional cosmic tensions characterized by the $H_0$ and $S_8$ discrepancies. Using the Fisher-bias formalism, we reconstruct minimal, data-driven $η(z)$ profiles that capture the late-time deviations required to reconcile early- and late-Universe calibrations. While a constant DDR offset preserves the Pantheon-inferred matter density $Ω_m = 0.334 \pm 0.018$--leaving its inconsistency with the Planck best-fit $Λ$CDM model and weak-lensing surveys unresolved--a time-varying DDR substantially reduces cross-dataset inconsistencies and improves the global fit, yielding $Δχ^2 \simeq -10$ relative to $Λ$CDM when the SH0ES prior is excluded. This result suggests that the $Ω_m$ discrepancy may represent indirect evidence for a time-varying DDR. A hybrid scenario combining a time-dependent DDR with a phantom-like dark energy transition achieves the most consistent global reconciliation, reducing the tension with DES-Y3 measurements to below $2σ$. These findings indicate that a mild DDR violation, coupled with evolving dark energy, offers a coherent pathway toward jointly addressing the $H_0$ and $S_8$ tensions. |
| title | Redshift-dependent Distance Duality Violation in Resolving Multidimensional Cosmic Tensions |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2511.02357 |