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Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy
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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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Cited by 1 Pith paper
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An intrinsic kinematic relation $\boldsymbol{c=\frac{c_{0}}{H_{0}}\,\dot{a}}\,$ inferred from Type Ia supernovae
The Pantheon supernova fit in a Dolgov–Barrow varying-speed-of-light cosmology favors the locus (1+ζ)μ=1, interpreted as c∝da/dt.
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