  The discovery of B-modes, and their effect on the fit to inflationary
parameters, opens a window to explore quantum gravity. In this paper we adopt
an effective theory approach to study quantum gravity effects in inflation. We
apply this approach to chaotic and $\phi^4$ inflation, and find that BICEP2
constrains these new operators to values which are consistent with the
effective theory approach. This result opens the possibility to study quantum
gravity in a systematic fashion, including its effect on Higgs inflation and
other Starobisnky-like models.

High Energy Physics - Phenomenology;Cosmology and Nongalactic Astrophysics;General Relativity and Quantum Cosmology