Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy
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 and speed of light c. \,Our mechanism for generating variable and c in 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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