{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/the-early-dark-energy-resolution-to-the","title":"The early dark energy resolution to the Hubble tension in light of weak lensing surveys and lensing anomalies","arxiv_id":"2009.10733","date":"2020-09-22","proceeding":null,"authors":["Riccardo Murgia","Guillermo F. Abellán","Vivian Poulin"],"abstract":"Early Dark Energy (EDE) contributing a fraction $f_{\\rm EDE}(z_c)\\sim 10 \\%$ of the energy density of the universe around $z_c\\simeq 3500$ and diluting as or faster than radiation afterwards, can provide a resolution to the Hubble tension, the $\\sim 5\\sigma$ discrepancy between the $H_0$ value derived from early- and late-universe observations within $\\Lambda$CDM. However, it has been pointed out that Large-Scale Structure (LSS) data, which are in $\\sim3\\sigma$ tension with $\\Lambda$CDM and EDE cosmologies, might alter these conclusions. We reassess the viability of the EDE against a host of high- and low-redshift measurements, by combining LSS observations from recent weak lensing (WL) surveys with CMB, Baryon Acoustic Oscillation (BAO), growth function (FS) and Supernova Ia (SNIa) data. Introducing a model whose only parameter is $f_{\\rm EDE}(z_c)$, we report a $\\sim 2\\sigma$ preference for non-zero $f_{\\rm EDE}(z_c)$ from Planck data alone and the tension with SH0ES is reduced below $2\\sigma$. Adding BAO, FS and SNIa does not affect this result, while the inclusion of a prior on $H_0$ from SH0ES increase the preference for non-zero EDE to $\\sim3.6\\sigma$. After checking the EDE non-linear matter power spectrum predicted by standard semi-analytical algorithms via a set of $N$-body simulations, we show that current WL data do not rule out EDE. We also caution against the interpretation of constraints obtained from combining statistically inconsistent data sets within the $\\Lambda$CDM cosmology. In light of the CMB lensing anomalies, we show that the lensing-marginalized CMB data also favor non-zero $f_{\\rm EDE}(z_c)$ at $\\sim2\\sigma$, predicts $H_0$ in $1.4\\sigma$ agreement with SH0ES and $S_8$ in $1.5\\sigma$ ($0.8\\sigma$) agreement with KV (DES) data. Alternatively, we discuss promising extensions of the EDE cosmology that could allow to fully restore cosmological concordance.","url_abs":"http://arxiv.org/abs/2009.10733v1","url_pdf":"http://arxiv.org/pdf/2009.10733v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"the-early-dark-energy-resolution-to-the","repo_url":"https://github.com/PoulinV/AxiCLASS","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":{"status":"ok"}}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}