Phys. Rev. D 50, 4914–4919 (1994)Is the gravitational action additive?Received 8 March 1994; published in the issue dated 15 October 1994 The gravitational action is not always additive in the usual sense. We provide a general prescription for the change in action that results when different portions of the boundary of a spacetime are topologically identified. We discuss possible implications for the superposition law of quantum gravity. We present a definition of ‘‘generalized additivity’’ which does hold for arbitrary spacetime composition. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.50.4914
DOI:
10.1103/PhysRevD.50.4914
PACS:
04.20.Cv, 04.60.-m
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