Meanings
proper noun
- A theorem stating that the interaction picture does not exist in an interacting, relativistic quantum field theory.
Origin
Named after Rudolf Haag.
Full word history & related roots →Cite this entry
APA
Haag's theorem. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Haag's%20theorem
MLA
“Haag's theorem.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Haag's%20theorem. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Haag's theorem,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Haag's%20theorem.
Source: Haag's theorem on Wiktionary, CC BY-SA 4.0.