AT1 - Extended Theories of Gravity and Quantum Cosmology |
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Speaker |
Loureiro Giacchini, Breno |
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Coauthors |
Tibério de Paula Netto and Ilya L. Shapiro |
| Talk Title |
Classical features of polynomial higher-derivative gravity |
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Abstract |
Local gravitational theories with more than four derivatives have remarkable quantum properties. Namely, they are super-renormalizable and may be unitary in the Lee-Wick sense, if the massive poles of the propagator are complex. It is important, therefore, to explore also the IR limit of these theories and identify possible observable signatures of the higher derivatives. In this talk we present recent results in this direction. Specifically, we discuss the effect that those higher-order terms can have on the Newtonian potential and related singularities. Also, we discuss the viability of a gravitational seesaw-like mechanism, which could be a mean of avoiding the Planck suppression of the higher derivatives' effects. |
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