Department of Mathematics2024-11-0920222469-992610.1103/PhysRevA.106.0375012-s2.0-85139429460http://dx.doi.org/10.1103/PhysRevA.106.037501https://hdl.handle.net/20.500.14288/9511In the work by Rebouças and Brandão [Phys. Rev. A 104, 063514 (2021)2469-992610.1103/PhysRevA.104.063514] the authors compute the scattering amplitude for a PT-symmetric double-δ-function potential in three dimensions by invoking the far-zone approximation and summing the resulting Born series. We show that the analysis of this paper suffers from a basic error. Therefore, its results are inconclusive. We give an exact closed-form expression for the scattering amplitude of this potential. OpticsPhysicsAtomic, molecular and chemical physicsOther2469-9934870237400005Q25501