Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Sauran shi ne babban aikinsa, a kan "Forces in Molecules", bisa ga ra'ayin John C. Slater, wanda ya yi sha'awar takarda don ya buga shi. A yau, an san shi da ka'idar Hellmann <unk> Feynman. A cikin 1939, Feynman ya sami digiri na farko, kuma an sanya shi ɗan Putnam Fellow. Ya sami cikakkiyar ci a jarrabawar shiga makarantar digiri na biyu zuwa Jami'ar Princeton a fannin kimiyyar lissafi - wani abin da ba a taɓa gani ba - da kuma kyakkyawan ci a fannin lissafi, amma ya yi rauni a fannin tarihi da sassan Ingilishi. Shugaban sashen kimiyyar lissafi a can, Henry D. Smyth, yana da wata damuwa, ya rubuta wa Philip M. Morse ya tambaya: "Shin Feynman Bayahude ne? Ba mu da wata doka ta musamman game da yahudawa amma dole ne mu kiyaye rabon su a cikin sashenmu kaɗan saboda wahalar sanya su. " Morse ya yarda cewa Feynman ya kasance Bayahude ne, amma ya tabbatar wa Smyth cewa Feynman's "physiognomy da kuma hali, duk da haka, ba su nuna alamar wannan halayyar ba".Masu halartar taron farko na Feynman, wanda ya kasance a kan tsarin gargajiya na ka'idar Wheeler-Feynman absorber, sun hada da Albert Einstein, Wolfgang Pauli, da John von Neumann. Pauli yayi tsokaci mai hangen nesa cewa ka'idar zata kasance mai matukar wahalar tantancewa, kuma Einstein ya ce mutum na iya kokarin amfani da wannan hanyar ga nauyi a cikin ka'idar dangi gaba daya, wanda Sir Fred Hoyle da Jayant Narlikar suka yi daga baya a matsayin ka'idar nauyi ta Hoyle <unk> Narlikar. Feynman ya sami Ph.D. daga Princeton a cikin 1942; mai ba da shawara game da aikinsa shi ne John Archibald Wheeler. A cikin takardar shaidar digirinsa mai taken "Ka'idar Karancin Aiki a Mechanics Quantum", Feynman ya yi amfani da ka'idar aiki na dakatarwa ga matsalolin ƙididdigar ƙididdigar ƙididdiga, wanda aka yi wahayi zuwa gare shi ta hanyar sha'awar ƙididdigar Wheeler-Feynman absorber ka'idar electrodynamics, kuma ya kafa tushe don tsara tsarin hanya da kuma zane-zanen Feynman. Wani muhimmin fahimta shi ne cewa positrons suna nuna hali kamar electrons suna komawa baya cikin lokaci. James Gleick ya rubuta cewa:  Tambaya: menene taken takardar shaidar PhD ta Feynman?
Ka'idar Ƙananan Ayyuka a Tsarin Kwayoyin