N3LO gravitational quadratic-in-spin interactions at G 4
Abstract We compute the N3LO gravitational quadratic-in-spin interactions at G 4 in the post-Newtonian (PN) expansion via the effective field theory (EFT) of gravitating spinning objects for the first time.This result contributes at the 5PN Electric Kettles order for maximally-spinning compact objects, adding the spinning case to the static sector