🌐EnglishEnglishDeutschItalianoРусский한국어中文日本語EntityQ1789519· pop 5· linked from 52 articlesSchwinger limitcritical field in QEDAvailable in 5 languagesDeutschРусскийCatalan한국어via Wikidata sitelinks · CC0ConnectionsLarge Hadron ColliderEntitytwo-photon physicsEntityCategoriesParticle physicsQuantum electrodynamicsQuantum optics