https://scholarlywiki.org/index.php?action=history&feed=atom&title=Biography%3ASin-Itiro_Tomonaga 2026-05-21T04:26:15Z Revision history for this page on the wiki MediaWiki 1.44.5 https://scholarlywiki.org/index.php?title=Biography:Sin-Itiro_Tomonaga&diff=6473&oldid=prev 2026-05-20T17:54:05Z

<p>Create quantum physics biography page</p> <p><b>New page</b></p><div>{{Infobox scientist<br /> | name = Sin-Itiro Tomonaga<br /> | image = Sin-Itiro_Tomonaga.jpg<br /> | caption = Sin-Itiro Tomonaga<br /> | birth_date = 31 March 1906<br /> | birth_place = Tokyo, Japan<br /> | death_date = 8 July 1979<br /> | death_place = Tokyo, Japan<br /> | fields = Theoretical physics<br /> | workplaces = Tokyo University of Education<br /> | alma_mater = Kyoto Imperial University<br /> | known_for = Renormalized quantum electrodynamics; Tomonaga-Schwinger equation<br /> | awards = Nobel Prize in Physics (1965)<br /> }}<br /> <br /> &#039;&#039;&#039;Sin-Itiro Tomonaga&#039;&#039;&#039; (31 March 1906 - 8 July 1979) was a Japanese theoretical physicist who helped build the modern form of [[Physics:Quantum Electrodynamics (QED)|quantum electrodynamics]]. He shared the 1965 Nobel Prize in Physics with [[Biography:Julian Schwinger|Julian Schwinger]] and [[Biography:Richard Feynman|Richard Feynman]] for fundamental work in QED, especially the development of relativistically consistent and renormalized methods.&lt;ref&gt;{{cite web |url=https://www.nobelprize.org/prizes/physics/1965/tomonaga/biographical/ |title=Sin-Itiro Tomonaga - Biographical |publisher=Nobel Prize Outreach |access-date=20 May 2026}}&lt;/ref&gt;<br /> <br /> Tomonaga developed his approach during and after World War II, working independently from related developments in the United States. His formulation treated interactions in quantum fields in a way compatible with special relativity, helping remove infinities from practical calculations and making QED a precise predictive theory.<br /> <br /> == Quantum electrodynamics ==<br /> Tomonaga&#039;s work belongs to the same conceptual family as Schwinger&#039;s operator methods and Feynman&#039;s diagrams. Together, these methods made [[Physics:Quantum electromagnetic field|quantized electromagnetic fields]] usable for high-precision calculations involving electrons, photons, and radiative corrections.<br /> <br /> The Tomonaga-Schwinger equation generalized quantum time evolution to arbitrary spacelike surfaces. This idea is important in the relativistic formulation of [[Physics:Quantum field theory (QFT) basics|quantum field theory]], where a single universal time coordinate is not always the most natural description.<br /> <br /> == See also ==<br /> * [[Physics:Quantum Electrodynamics (QED)]]<br /> * [[Physics:Quantum electromagnetic field]]<br /> * [[Physics:Quantum field theory (QFT) basics]]<br /> * [[Biography:Julian Schwinger]]<br /> * [[Biography:Richard Feynman]]<br /> <br /> == References ==<br /> {{reflist|3}}<br /> <br /> {{DEFAULTSORT:Tomonaga, Sin-Itiro}}<br /> [[Category:Nobel laureates in Physics]]<br /> [[Category:Quantum physicists]]<br /> [[Category:Theoretical physicists]]<br /> <br /> {{Sourceattribution|Biography:Sin-Itiro Tomonaga|1}}</div>

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