For others who, like me, aren't in the field, the "EFT" mentioned is explained, for example, here:
https://arxiv.org/abs/gr-qc/0311082
"The problems of quantizing gravity within the experimentally accessible situations are similar to those which arise in a host of other non-gravitational applications throughout physics. As such, the size of quantum corrections can be safely estimated and are extremely small. The theoretical framework which allows this quantification is the formalism of effective field theories."
dS is "de Sitter space": https://en.wikipedia.org/wiki/De_Sitter_space
I'd also appreciate a link to the explanation of "What in GR we would consider perturbations of dS and IR corrections."
