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arXiv · 2412.04257

Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy

Hoang Ky Nguyen
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Abstract

We reveal a novel aspect of scale-invariant actions that allow matter to couple with a dilaton field: $\,$The dynamics of the dilaton can induce variations in the Planck constant $\hbar$ and speed of light $c$. $\,$Our mechanism for generating variable $\hbar$ and $c$ in $\textit{curved}$ spacetimes via the dilaton offers a viable alternative account for late-time cosmic acceleration, bypassing the need for dark energy.

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Hoang Ky Nguyen. 2024-12-05. Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy. https://doi.org/10.1016/j.physletb.2025.139357

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