Julian Schwinger
= Julian Schwinger
{c}
{tag=Physicist}
{title2=1918–1994}
{wiki}
= Julian Seymour Schwinger
{c}
{synonym}
<Julian Schwinger> calculated the leading radiative correction to the <electron>'s <magnetic moment> in <quantum electrodynamics>. In modern notation, its anomalous part is $a_e=(g-2)/2=\alpha/(2\pi)+\cdots$, where $\alpha$ is the <fine-structure constant>. The small correction could be compared with magnetic and spectroscopic measurements. His 1948 paper therefore turned the interaction of the <electron> with the quantized field into a precise, finite prediction beyond the simplest magnetic-moment value.<On Quantum-Electrodynamics and the Magnetic Moment of the Electron by Julian Seymour Schwinger>[1948, additional spin magnetic moment, comparison with hyperfine and magnetic measurements]{ref}
A <physicist>.https://community.harvard.edu/event/memories-julian-celebration-centennial-birth-julian-schwinger[Independent professional profile]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Julian_Schwinger.jpg?width=260]
{title=Portrait of <Julian Schwinger>}
{description=AIP Emilio Segrè Visual Archives, Segrè Collection; American Institute of Physics (AIP). https://commons.wikimedia.org/wiki/File:Julian_Schwinger.jpg#Licensing[American Institute of Physics attribution-only permission], via Wikimedia Commons.}
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