A new technique to calculate the physical running of couplings in quadratic gravity

Researchers at the International School for Advanced Studies in Trieste, University of Massachusetts, and Instituto de Física Teórica at Universidade Estadual Paulista in Brazil recently introduced an alternative approach to derive the correct physical beta functions of couplings in quadratic gravity. Their paper, published in Physical Review Letters, could contribute to the use of the theory of quadratic gravity for describing a wide range of gravitational phenomena.