Abstract
In a recent paper, Coutinho, Nogami, and Tomio [Phys. Rev. A 59, 2624 (1999)] presented an example in which, they claim, Feynman’s prescription of disregarding the Pauli principle in intermediate states of perturbation theory fails. We show that, contrary to their claim, Feynman’s prescription is consistent with the exact solution of their example.
- Received 31 August 1999
DOI:https://doi.org/10.1103/PhysRevA.62.016101
©2000 American Physical Society