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A time varying speed of light as a solution to cosmological puzzles
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A time varying speed of light as a solution to cosmological puzzles
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We consider the cosmological implications of light travelling faster in the early Universe. We propose a prescription for deriving corrections to the cosmological evolution equations while the speed of light $c$ is changing. We then show how the horizon, flatness, and cosmological constant problems may be solved. We also study cosmological perturbations in this scenario and show how one may solve the homogeneity and isotropy problems. As it stands, our scenario appears to most easily produce extreme homogeneity, requiring structure to be produced in the Standard Big Bang epoch. Producing significant perturbations during the earlier epoch would require a rather careful design of the function $c(t)$. The large entropy inside the horizon nowadays can also be accounted for in this scenario.
Forward citations
Cited by 2 Pith papers
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Lorentz Violation in Emergent Gravity and Its Cosmological Consequences
Emergent gravity is recast as an Otto cycle; adding work legs yields Lorentz violation and matter creation that can drive late-time cosmic acceleration.
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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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