The Running Gravitational Couplings
Djamel Dou, Roberto Percacci
TL;DR
This paper investigates how quantum fields influence the evolution of fundamental gravitational constants, revealing that the cosmological constant can vary significantly across scales while Newton's constant remains nearly unchanged.
Contribution
It provides a comprehensive calculation of the scale dependence of the cosmological and Newton's constants considering quantum fields of various spins.
Findings
Newton's constant remains nearly constant across scales.
The cosmological constant can change by many orders of magnitude.
Zero modes drive the cosmological constant to zero in the infrared.
Abstract
We compute the running of the cosmological constant and Newton's constant taking into account the effect of quantum fields with any spin between 0 and 2. We find that Newton's constant does not vary appreciably but the cosmological constant can change by many orders of magnitude when one goes from cosmological scales to typical elementary particle scales. In the extreme infrared, zero modes drive the cosmological constant to zero.
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