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"): Edward Teller (Hungarian: "Teller Ede" ; January 15, 1908 – September 9, 2003) was a Hungarian-American theoretical physicist who was born in Hungary, and is known colloquially as "the father of the hydrogen bomb", although he claimed he did not care for the title.
Relevant evidence: Yes