Emergent cosmological model from running Newton constant
Zholdasbek A. Chakrabarty H. Malafarina D. Bonanno A.
15 May 2025American Physical Society
Physical Review D
2025#111Issue 10
We propose an emergent cosmological model rooted in the asymptotically safe antiscreening behavior of the Newton constant at Planckian energies. Distinguishing itself from prior approaches, our model encapsulates the variable nature of G through a multiplicative coupling within the matter Lagrangian, characterized by a conserved energy-momentum tensor. The Universe emerges from a quasi-de Sitter phase, transitioning to standard cosmological evolution post-Planck era. Our analysis demonstrates the feasibility of constraining the transition scale to nearly classical cosmology using cosmic microwave background data and the potential to empirically probe the antiscreening trait of Newtons constant, as predicted by asymptotic safety.
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Department of Physics, Nazarbayev University, Kabanbay Batyr 53, Astana, 010000, Kazakhstan
INAF, Osservatorio Astrofisico di Catania, via Santa Sofia 78, Catania, I-95123, Italy
Department of Physics
INAF
10 лет помогаем публиковать статьи Международный издатель
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