Dark Energy within the Generalized Uncertainty Principle in Light of DESI DR2

Abstract

In this study, we modify the $\Lambda$CDM model by introducing a deformed algebra within the framework of the Generalized Uncertainty Principle (GUP). We formulate the modified Raychaudhuri equation, where new terms are introduced which describe dynamical pressure components. For the quadratic GUP model, we derive the Hubble function, which leads to a time-dependent dark energy model. The free parameters are determined using late-time observational data, the Pantheon+ SNIa sample, the cosmic chronometers, and the DESI 2025 BAO data. We find that the modified model introduce only one new additional degree of freedom compared to the $\Lambda$CDM model. The GUP-Modified $\Lambda$CDM model provides a better fit to the data than the undeformed theory. Furthermore, we compare the same model with the DESI 2024 BAO data and find that the Bayesian evidence becomes stronger with the inclusion of the DESI 2025 release.

19 pages, 4 figures, to appear in JCAP

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Cited by in corpus (7)

• Interacting dark energy after DESI DR2: a challenge for $\Lambda$CDM paradigm?
• Challenging $\Lambda$CDM with Higher-Order GUP Corrections
• Addressing the $H_0$ tension through matter with pressure and no early dark energy
• A New Window on Dynamical Dark Energy: Combining DESI-DR2 BAO with future Gravitational Wave Observations
• Constraints on Generalized Gravity-Thermodynamic Cosmology from DESI DR2
• Observational constraints on the modified cosmology inspired by string T-duality
• Statistical physics on Euclidean Snyder space: connections with the GUP and cosmological implications