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arXiv · 2308.05251

On the local term in the anomaly-induced action of Weyl quantum gravity

Andrei O. Barvinsky·Guilherme H. S. Camargo·Alexei E. Kalugin·Nobuyoshi Ohta·Ilya L. Shapiro
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Abstract

The finite local conformally non-invariant $R^2$-term emerges in the one-loop effective action of the model of quantum gravity based on the Weyl-squared classical action. This term is related to the $\Box R$ contribution to the conformal anomaly, which in a wide class of regularization schemes is determined by the second Schwinger-DeWitt (or Gilkey-Seeley) coefficient of the heat kernel expansion for inverse propagators of the theory. The calculation of this term requires evaluating the contributions of the fourth-order derivative minimal and of the second-order nonminimal operators in the tensor and vector sectors of the theory, corresponding to metric, ghost and gauge-fixing operators. To ensure the correctness of existing formulas, we derived (and confirmed) the result using a special technique of calculations, based on the heat-kernel representation of the Euclidean Green's function and the method of universal functional traces.

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Andrei O. Barvinsky, Guilherme H. S. Camargo, Alexei E. Kalugin, Nobuyoshi Ohta, Ilya L. Shapiro. 2023-09-28. On the local term in the anomaly-induced action of Weyl quantum gravity. https://arxiv.org/abs/2308.05251

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