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The aim is to explore discrepancies in the standard ΛCDM model by examining the spacetime continuum's rheological properties.

April 24, 2026Open Access

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Rheological Interpretation of Fundamental Interactions A Viscous Fermionic Condensate Model (ψ-field)

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The aim is to explore discrepancies in the standard ΛCDM model by examining the spacetime continuum's rheological properties.
Analyzed the discrepancies in the ΛCDM model regarding H0 and S8 tensions.
Proposed the Fermionic Universe Hypothesis to redefine spacetime characteristics.
Examined finite viscosity and saturation density within the model.
Identified significant tensions in the ΛCDM model at 5σ and 3.2σ levels.
Showed that these tensions can be explained through the viscosity of spacetime.
Introduced a specific saturation density of ρ = 8.84 × 10−27 kg/m^3.

Abstract

The standard ΛCDM model faces critical discrepancies at the levels of 5σ (H0 tension) and 3. 2σ (S8 tension). The Fermionic Universe Hypothesis (FUH) proposes to treat these anomalies not as a defect in matter distribution, but as a manifestation of the rheological properties of the spacetime continuum, which possesses finite viscosity and a saturation density of ρ = 8. 84 × 10−27 kg/m³.

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Rheological Interpretation of Fundamental Interactions A Viscous Fermionic Condensate Model (ψ-field)

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