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- W2916836741 abstract "We present a model that naturally tunes a large positive cosmological constant to a small cosmological constant. A slowly rolling scalar field decreases the cosmological constant to a small negative value, causing the universe to contract, thus reheating it. An expanding universe with a small positive cosmological constant can be obtained, respectively, by coupling this solution to any model of a cosmological bounce and coupling the scalar field to a sector that undergoes a technically natural phase transition at the meV scale. A robust prediction of this model is a rolling scalar field today with some coupling to the standard model. This can potentially be experimentally probed in a variety of cosmological and terrestrial experiments, such as probes of the equation of state of dark energy, birefringence in the cosmic microwave background and terrestrial tests of Lorentz violation." @default.
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- W2916836741 date "2019-07-30" @default.
- W2916836741 modified "2023-10-17" @default.
- W2916836741 title "Relaxation of the cosmological constant" @default.
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- W2916836741 doi "https://doi.org/10.1103/physrevd.100.015048" @default.
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