## Julian Schwinger and Quantum Electrodynamics

On February 12, 1918, US-american theoretical physicist and Nobel Laureate Julian Seymour Schwinger was born. Schwinger is best known for his work on the theory of quantum electrodynamics (QED), in particular for developing a relativistically invariant perturbation theory, and for renormalizing QED to one loop order. Julian Seymour Schwinger was born in New York City, to Orthodox Jewish parents originally from Poland, Belle and Benjamin Schwinger, a prosperous garment manufacturer.…