PreprintCC BY 4.0arXiv
Revisiting the Hubble tension with an inverse power-law early dark energy
Abstract
We propose a new early dark energy with a potential that has an inverse power-law asymptotic tail to alleviate the Hubble tension. Fitting this model to the datasets of CMB+BAO+SN+H0DN, one obtains a 68% confidence-level value of H0∼ 70.20+0.60−0.47 km s−1Mpc−1 and a best-fit value of H0∼ 70.56 km s−1Mpc−1 for index n=10. We show that this model can be tested by future data of CMB and matter power spectra. Finally, we briefly discuss fine-tuning problems related to this model.
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BibTeX
@misc{zhou2026revisiting,
title = {{Revisiting the Hubble tension with an inverse power-law early dark energy}},
author = {Quan Zhou and Sibo Zheng},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.26507},
eprint = {2608.26507},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.26507},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Revisiting the Hubble tension with an inverse power-law early dark energy
AU - Quan Zhou
AU - Sibo Zheng
PY - 2026
DA - 2026/09/04
PB - arXiv
DO - 10.48550/arxiv.2608.26507
UR - https://arxiv.org/abs/2608.26507
AB - We propose a new early dark energy with a potential that has an inverse power-law asymptotic tail to alleviate the Hubble tension. Fitting this model to the datasets of CMB+BAO+SN+H0DN, one obtains a 68% confidence-level value of H_0∼ 70.20^+0.60_−0.47 km s^−1Mpc^−1 and a best-fit value of H_0∼ 70.56 km s^−1Mpc^−1 for index n=10. We show that this model can be tested by future data of CMB and matter power spectra. Finally, we briefly discuss fine-tuning problems related to this model.
ER -