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Journal Article

Ghost-Free Infinite Derivative Gravity

MPS-Authors

Gording,  Brage
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schmidt-May,  Angnis
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

Gording, B., & Schmidt-May, A. (2018). Ghost-Free Infinite Derivative Gravity. Journal of High Energy Physics, (1809), 044. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-145.


Cite as: https://hdl.handle.net/21.11116/0000-0003-F90D-7
Abstract
We present the construction of a gravitational action including an infinite series of higher derivative terms. The outcome is a classically con sistent completion of a well-studied quadratic curvature theory. The closed form for the full action is ghost-free bimetric theory, describing the interactions of a massive and a massless spin-2 field. At energies much smaller than the spin-2 mass scale, the theory reduces to general relativity. For energies comparable to the spin-2 mass, the higher derivative terms completing t he Einstein-Hilbert action capture the effects of the additional massive spin-2 field. The theory is only ghost-free when the full series of higher derivatives is kept.