{"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/testing-the-nature-of-dark-energy-with","title":"Testing the nature of Dark Energy with Precision Cosmological constraints","arxiv_id":"1805.01510","date":"2018-05-03","proceeding":null,"authors":["A. de la Macorra","E. Almaraz"],"abstract":"We present a Dark Energy (DE) model with a sound derivation as a natural extension of the Standard Model of particle physics with no free parameters and an excellent fit with current cosmological data improving by 21% the $\\Lambda$CDM fit of the Baryon Acoustic Oscillations (BAO) measurements, specially designed to determine the dynamics of DE. DE corresponds to the lightest bound state scalar particle $\\phi$ with a potential $V=\\Lambda_c^{4+2/3}\\phi^{-2/3}$ dynamically formed at the condensation energy scale $\\Lambda_c$ and scale factor $a_c$. The value of $\\Lambda_c$, the exponent $n=2/3$, and the initial conditions of $\\phi$ are all derived quantities. We obtain an exact constraint $a_c\\Lambda_c/\\textrm{eV}=1.0939\\times 10^{-4}$ and a theoretical prediction $\\Lambda_c=34 ^{+16}_{-11} \\textrm{ eV}$, consistent with the best fit $\\Lambda_c=44.08\\pm 0.27 \\textrm{ eV}$. We test our model constraint on $a_c\\Lambda_c$ by allowing $a_c$ and $\\Lambda_c$ to vary independently and remarkably our prediction has a relative difference of only 0.2% with the best fit value. Unlike a cosmological constant $\\Lambda$, our DE model predicts the amount of DE and leaves detectable cosmological imprints at different times and scales at a background and perturbation level.","url_abs":"https://arxiv.org/abs/1805.01510v1","url_pdf":"https://arxiv.org/pdf/1805.01510v1.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":"testing-the-nature-of-dark-energy-with","repo_url":"https://github.com/ealmaraz/Bound_Dark_Energy_CAMB","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null},{"paper_slug":"testing-the-nature-of-dark-energy-with","repo_url":"https://github.com/ealmaraz/Bound_Dark_Energy_CosmoMC","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}