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We consider the interatomic van der Waals interaction energy between twoneutral ground-state atoms moving in the vacuum space with the same uniformacceleration. We assume the acceleration orthogonal to their separation, sothat their mutual distance remains constant. Using a model for the van derWaals dispersion interaction based on the interaction between the instantaneousatomic dipole moments, which are induced and correlated by the zero-point fieldfluctuations, we evaluate the interaction energy between the two acceleratingatoms in terms of quantities expressed in the laboratory reference frame. Wefind that the dependence of the van der Waals interaction between the atomsfrom the distance is different with respect to the case of atoms at rest, andthe relation of our results with the Unruh effect is discussed. We show that inthe near zone a new term proportional to $R^{-5}$ adds to the usual $R^{-6}$behavior, and in the far zone a term proportional to $R^{-6}$ adds to the usual$R^{-7}$ behavior, making the interaction of a longer range. We also find thatthe interaction energy is time-dependent, and the physical meaning of thisresult is discussed. In particular, we find acceleration-dependent correctionsto the $R^{-7}$ (far zone) and $R^{-6}$ (near zone) proportional to$a^2t^2/c^2$; this suggests that significant changes to the van der Waalsinteraction between the atoms could be obtained if sufficiently long times aretaken, without necessity of the extremely high accelerations required by otherknown manifestations of the Unruh effect.

van der Waals Interaction Energy Between Two Atoms Moving With Uniform Acceleration