Breaking Free from the Swampland of Impossible Universes Through the DESI Portal

2026/05/11 by Luis A. Anchordoqui, Dieter Lust, Dieter Lüst · 1 citation
Physics and Astronomy · #Baryon acoustic oscillations #Cold dark matter #Cosmological constant #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #De Sitter universe #Lambda-CDM model #Particle physics theoretical and experimental studies #String (physics) #String theory

paper · pdf · open access · doi:10.3390/universe12070216

published in Universe 12(7), 216 (Multidisciplinary Digital Publishing Institute)

openalex publication_date 2026/07/21 · openalex created_date 2026/07/22 · openalex updated_date 2026/08/05

Abstract

The persistent challenge of creating stable de Sitter vacua within string theory undermines the observational validity of the Λ cold dark matter (CDM) model. This difficulty suggests that the concordance model of cosmology, characterized by a constant dark energy Λ, may reside in the swampland of inconsistent quantum gravity theories rather than the string landscape of consistent ones. Recent observational data, particularly from the Dark Energy Spectroscopic Instrument (DESI), have significantly challenged ΛCDM cosmology. Specifically, the combination of DESI baryon acoustic oscillation measurements with cosmological surveys seems to indicate a preference for a dynamic, time-evolving dark energy rather than a constant, with roughly 10% reduction in density over the last several billion years. This review summarizes significant advancements made over the past two years in linking DESI findings to string-inspired scenarios.

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Cited by

• TransPlanckian Censorship on Dark Dimension Inflation

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