Julian Seymour Schwinger (/ˈʃwɪŋər/; 12 Februari 1918 – 16 Julai 1994) ialah ahli fizik teori Amerika dan pemenang Hadiah Nobel. Beliau terkenal dengan kerjanya mengenai teori elektrodinamik kuantum (QED), khususnya untuk membangun teori perturbasi yang bersifat relativistik, dan untuk pengubahsuaian QED ke satu urutan gelung. Schwinger ialah profesor fizik di beberapa universiti.
Schwinger, J (1949). "Quantum Electrodynamics. III. The Electromagnetic Properties of the Electron Radiative Corrections to Scattering". Phys. Rev. 76 (6): 790–817. Bibcode:1949PhRv...76..790S. doi:10.1103/PhysRev.76.790.
Schwinger, J. "On Angular Momentum", Harvard University, Nuclear Development Associates, Inc., United States Department of Energy (through predecessor agency the Atomic Energy Commission) (January 26, 1952).
Mehra, Jagdish, and Milton, Kimball A. (2000) Climbing the Mountain: the scientific biography of Julian Schwinger. Oxford University Press.
Milton, Kimball (2007). "Julian Schwinger: Nuclear Physics, the Radiation Laboratory, Renormalized QED, Source Theory, and Beyond". Physics in Perspective. 9 (1): 70–114. arXiv:physics/0610054. Bibcode:2007PhP.....9...70M. doi:10.1007/s00016-007-0326-6. Revised version published as (2007) "Julian Schwinger: From Nuclear Physics and Quantum Electrodynamics to Source Theory and Beyond," Physics in Perspective9: 70–114.
Ng, Y. Jack, ed. (1996) Julian Schwinger: The Physicist, the Teacher, and the Man. Singapore: World Scientific. ISBN981-02-2531-8.
Julian Seymour Schwinger (2000), Kimball A. Milton (penyunting), A quantum legacy: seminal papers of Julian Schwinger, World Scientific series in 20th century physics, 26, World Scientific, Bibcode:2000qlsp.book.....K, ISBN978-981-02-4006-6