Question: Charles Louis Critchfield earned his PhD in Physics from George Washington University under the direction of which theoretical physicist who was known as "the father of the hydrogen bomb."
Sentence (from "Edward Teller"): His extension of Enrico Fermi's theory of beta decay, in the form of Gamow–Teller transitions, provided an important stepping stone in its application, while the Jahn–Teller effect and the Brunauer–Emmett–Teller (BET) theory have retained their original formulation and are still mainstays in physics and chemistry.
Relevant evidence: No