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Counting ghosts in the “ghost-free” non-local gravity

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Published in Physics Letters. B. 2015, vol. 744, p. 67-73
Collection Open Access - SCOAP3
Abstract In the recently proposed non-local theory of quantum gravity one can avoid massive tensor ghosts at the tree level by introducing an exponential form factor between the two Ricci tensors. We show that at the quantum level this theory has an infinite amount of massive unphysical states, mostly corresponding to complex poles.
Keywords Quantum gravityMassive ghostsHigher derivativesRenormalizationNon-local theories
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SHAPIRO, Ilya. Counting ghosts in the “ghost-free” non-local gravity. In: Physics Letters. B, 2015, vol. 744, p. 67-73. https://archive-ouverte.unige.ch/unige:55727

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Deposited on : 2015-04-27

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