Quantum Corrections to Unimodular Gravity
Enrique \'Alvarez, Sergio Gonz\'alez-Mart\'in, Mario Herrero-Valea and, Carmelo P. Mart\'in
TL;DR
This paper investigates how quantum corrections affect the cosmological constant in Unimodular Gravity, showing that these corrections do not alter its classical value, thus providing insights into the cosmological constant problem.
Contribution
It demonstrates that quantum corrections do not renormalize the classical value of the cosmological constant in Unimodular Gravity.
Findings
Quantum corrections do not change the classical cosmological constant.
Unimodular Gravity offers a different perspective on the cosmological constant problem.
The classical value remains stable under quantum effects.
Abstract
The problem of the cosmological constant appears in a new light in Unimodular Gravity. In particular, the zero momentum piece of the potential (that is, the constant piece independent of the matter fields) does not automatically produce a cosmological constant proportional to it. The aim of this paper is to give some details on a calculation showing that quantum corrections do not renormalize the classical value of this observable.
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