What does this research mean for the field?

Cosmic acceleration and the cosmological constant are manifestations of time curvature arising from the mapping of physical time to cosmological time, rather than being driven by vacuum energy or dark energy. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

What question did this study set out to answer?

This work aims to reinterpret cosmic acceleration as a result of time curvature rather than vacuum energy.

April 27, 2026Open Access

Time Curvature as the True Origin of Cosmic Acceleration

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This work aims to reinterpret cosmic acceleration as a result of time curvature rather than vacuum energy.
Used the upstream admissibility framework to analyze cosmic acceleration.
Demonstrated how the expansion equation can be split into physical evolution and a curvature term.
Established the curvature term as diffeomorphism-invariant, replacing the cosmological constant in Einstein’s equations.
Removed the cosmological constant problem, providing a new geometric mechanism for acceleration.
Unified early and late cosmic acceleration without invoking dark energy or new components.
Preserved all observational predictions of the ΛCDM model while offering alternatives for cosmic transitions.

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Implication

This work presents a geometric reinterpretation of cosmic acceleration, suggesting time curvature as its source without dark energy.

Cite This Study

L. D. L. Nguyen (2026) studied this question.

synapsesocial.com/papers/69eefd9bfede9185760d444e https://doi.org/10.5281/zenodo.19766834

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Time Curvature as the True Origin of Cosmic Acceleration

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Discussion

Implication

Cite This Study

Time Curvature as the True Origin of Cosmic Acceleration

Key Points

Discussion

Implication

Cite This Study

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