title: Calculation of the first nonlinear contribution to the general-relativistic spin-spin interaction for binary systems.
abstract: We use recently developed effective field theory techniques to calculate the third order post-Newtonian correction to the spin-spin potential between two spinning objects. This correction represents the first contribution to the spin-spin interaction due to the nonlinear nature of general relativity and will play an important role in forthcoming gravity wave experiments.
authors.affiliation: Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
authors.forename: Rafael A
authors.initials: RA
authors.lastname: Porto
authors.forename: Ira Z
authors.initials: IZ
authors.lastname: Rothstein