Uploaded September 2021 | Updated September 2026, 2 weeks ago
Two papers, one by J. Robert Oppenheimer and the other by Hans Bethe, "bookend" a period in the development of quantum field theory in which physicists struggled with infinities that kept popping up in calculations and threatened to derail the entire field. Bethe's solution of "mass renormalization" provided a path forward and led to an explanation of the "Lamb shift," a tiny energy shift in the Hydrogen spectrum that was discovered shortly after World War 2.
Two papers, one by J. Robert Oppenheimer and the other by Hans Bethe, "bookend" a period in the development of quantum field theory in which physicists struggled with infinities that kept popping up in calculations and threatened to derail the entire field. Bethe's solution of "mass renormalization" provided a path forward and led to an explanation of the "Lamb shift," a tiny energy shift in the Hydrogen spectrum that was discovered shortly after World War 2.
