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Incoming links: Jordan, Pascual (1902–1980)
Pascual Jordan Created 2026-10-18 Updated 2026-11-05
Pascual Jordan and Max Born helped turn the new quantum mechanics into a systematic matrix calculus. In this description, a position operator and a momentum operator generally do not commute; the canonical rule is . The order of multiplication therefore carries physical information, rather than being a notational detail. Their 1925 paper developed the mathematical rules connecting these noncommuting quantities with the dynamics and transition frequencies of quantum systems.[ref]
Zur Quantenmechanik by Max Born and Pascual Jordan. 1925 paper, matrix multiplication and canonical quantum condition
A physicist who developed matrix mechanics and held a professorship in theoretical physics at Hamburg.[ref]
Jordan, Pascual (1902–1980). Bezug zu Hamburg: theoretical physics professor; Lebenslauf: full name and 1902–1980 dates
Portrait of Pascual Jordan
. Unknown photographer; Mondadori Publishers. Public domain (anonymous historical photograph, as declared on Commons). Source and usage information on the linked Wikimedia file page. Source.