Norman Myles Kroll (6 April 1922, Tulsa, Oklahoma – 8 August 2004, La Jolla, California) was an American theoretical physicist, known for his pioneering work in QED.
Based on Kroll's thesis work, the paper provided the first theoretical explanation of the Lamb shift in QED and became one of the most important landmarks of the field.
[1]In the academic year 1948–1949 he was a visiting scholar at the Institute for Advanced Study, where he, with Robert Karplus, calculated the QED two-loop contributions for the anomalous magnetic moment of the electron.
[5] This work was part of the pioneering efforts that led to the QED formalism developed by Richard Feynman, Julian Schwinger, and Sin-Itiro Tomonaga.
During his four decades at UCSD, Kroll continued his research in QED, developed with Marshall Rosenbluth a theory of the free electron laser, and participated in the design of particle accelerators.