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19 January 2022
 
  » arxiv » hep-th/9510205

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Partial summation of the nonlocal expansion for the gravitational effective action in 4 dimensions
A. G. Mirzabekian ; G. A. Vilkovisky ; V. V. Zhytnikov ;
Date 27 Oct 1995
Journal Phys.Lett. B369 (1996) 215-220
Subject hep-th gr-qc
AbstractThe vacuum action for the gravitational field admits a known expansion in powers of the Ricci tensor with nonlocal operator coefficients (form factors). We show that going over to a different basis of curvature invariants makes possible a partial summation of this expansion. Only the form factors of the Weyl-tensor invariants need be calculated. The full action is then uniquely recovered to all orders from the knowledge of the trace anomaly. We present an explicit expression for the partially summed action, and point out simplifications resulting in the vertex functions. An application to the effect of the vacuum gravitational waves is discussed.
Source arXiv, hep-th/9510205
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