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Conformal fixed point, Cosmological Constant and Quintessence

C. Wetterich
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Abstract

We connect a possible solution for the ``cosmological constant problem'' to the existence of a (postulated) conformal fixed point in a fundamental theory. The resulting cosmology leads to quintessence, where the present acceleration of the expansion of the universe is linked to a crossover in the flow of coupling constants.

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C. Wetterich. 2003-02-24. Conformal fixed point, Cosmological Constant and Quintessence. https://doi.org/10.1103/physrevlett.90.231302

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