XCDM: a running vacuum strategy for crossing the phantom divide

arXiv:2607.26050 · astro-ph.CO, gr-qc, hep-ph · Submitted 2026-07-28 · Read on arXiv

Joan Solà Peracaula, Adrià Gómez-Valent, Alex González-Fuentes

astro-ph.CO, gr-qc, hep-ph

Submitted: 2026-07-28

Comments: LaTeX, 19 pages, 2 Tables and 6 Figures, extended discussion

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Quintessence — 18× in this paper · explained in 2 episodes
• Calibration — 5× in this paper · explained in 7 episodes
• Running Vacuum Model — 5× in this paper
• Model-Agnostic — 4× in this paper · explained in 2 episodes
• Core — 3× in this paper · explained in 2 episodes
• Decoupling — 2× in this paper · explained in 2 episodes
• Degeneracy — 2× in this paper · explained in 3 episodes
• Benchmark — 1× in this paper · explained in 2 episodes
• Clustering — 1× in this paper · explained in 2 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Equation of State (EoS) — 1× in this paper · explained in 4 episodes
• Hubble Tension — 1× in this paper · explained in 9 episodes
• Matter Power Spectrum — 1× in this paper · explained in 2 episodes

Sources

• Dark Energy Survey Year 6 Results: Cosmological Constraints from Cosmic Shear
• A Friendly Phantom: Late-time AdS-to-dS transition and cosmological tensions
• $\Lambda_{\rm s}$CDM model: A promising scenario for alleviation of cosmological tensions
• Alleviating the Hubble Tension with Smooth Sign-Switching Dark Energy: Full CMB Constraints with DESI and PantheonPlus
• Constraints on Coupled Dark Energy in the DESI Era
• The Cosmic Linear Anisotropy Solving System (CLASS) I: Overview
• GetDist: a Python package for analysing Monte Carlo samples
• Robust Preference for Dark Sector Interactions
• Hubble tension: the shape wall

Related papers

• Angular clustering and bias of photometric quasars in the Kilo-Degree Survey Data Release 4
• A Novel kinetic Sunyaev-Zel'dovich Estimator for Electron-Electron Correlations
• Magnetic fields at the dawn of structure formation I. The CARLA J1510+5958 proto-cluster
• Dark Energy Survey Year 6 Results: Weak Lensing and Galaxy Clustering Cosmological Analysis Framework
• Exploring the Impact of Systematic Bias in Type Ia Supernova Cosmology Across Diverse Dark Energy Parametrizations
• Non-Gaussian Galaxy Stochasticity and the Noise-Field Formulation