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Ghost-free infinite derivative gravity
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DOI：10.1007/JHEP09(2018)044.png)
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摘要
En 中文
We present the construction of a gravitational action including an infinite series of higher derivative terms. The outcome is a classically consistent 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 the 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.
Keyword:
Classical Theories of Gravity
Models of Quantum Gravity
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期刊
IF:
5.5
论文数:
4.0W
被引数:
13.7W
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