The Hubble parameter of the Local Distance Ladder from dynamical dark energy with no free parameters
Year: 2025
Type: article
Abstract: Invited talk 21st Rencontres du Vietnam. The Local Distance Ladder (LDL) places tight constraints on the late-time Hubble expansion. While the existence of dark energy is well established, its origin remains elusive. Recent observational hints of a dynamical dark energy component—if confirmed—could help resolve longstanding tensions between LDL measurements and early-Universe observations from the Planck CMB. In this work, we investigate dark energy from first principles, motivated by the anomalous scaling dimension 2 of cosmological phase space rooted in black hole physics. This framework naturally introduces a dynamical dark energy term, Λ = J, where J is the trace of the Schouten tensor, yielding an effective relation ΩΛ = (1 − q)/3 in terms of the deceleration parameter q. Using a closed-form expression for H(z), we show that this model fits the LDL-derived value of H0—consistent with Riess et al. (2022)—while maintaining a matter density aligned with BAO-inferred values in the Planck ΛCDM framework. These findings support the possibility that dark energy may have a geometric origin, potentially involving higher-order cosmographic quantities beyond q.
Author: van Putten, Maurice H.P.M.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6912012599
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