A note on the Gauge Symmetries of Unimodular Gravity
The symmetries of Unimodular Gravity are clarified somewhat.
hep-th↗
arXiv subjects
Carmelo P. Martín
Publications and source records attributed to Carmelo P. Martín.
Conformal Dilaton Gravity: Classical Noninvariance Gives Rise To Quantum Invariance
When quantizing Conformal Dilaton Gravity there is a conformal anomaly which starts at two loop order. This anomaly stems from evanescent operators on the divergent parts of the effective action. The general form of the finite counterterm which is necessary in order to insure cancellation of the Weyl anomaly to every order in perturbation theory has been determined using only conformal invariance . Those finite counterterms do not have any inverse power of any mass scale in front of them (precisely because of conformal invariance) and then they are not negligible in the low energy deep infrared limit. The general form of the ensuing modifications to the scalar field equation of motion has been determined and some physical consequences extracted.
hep-th↗
Quantum Corrections to Unimodular Gravity
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.
hep-th↗