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Rudolf Haag

Rudolf Haag German physicist

German physicist
The basics
Quick Facts
Intro German physicist
Was Scientist Physicist Professor Educator
From Germany
Type Academia Science
Gender male
Birth 1922, Tübingen, Germany
Death 5 January 2016 (aged 94 years)
The details

Rudolf Haag (17 August 1922 – 5 January 2016) was a German physicist. He was best known for his contributions to the algebraic formulation of axiomatic quantum field theory (QFT), namely the Haag–Kastler axioms, and a central no-go theorem in QFT, Haag's theorem, which demonstrates the nonexistence of a unitary time-evolution operator in the interaction picture.

Early life

Haag was born in Tübingen, Germany. He studied Physics at Technische Hochschule Stuttgart, now the University of Stuttgart, from 1948 to 1954 and then worked on his dissertation in Munich and defended in 1951. His supervisor was Fritz Bopp.


From 1956 to 1957 he was at Max Planck Institute in Göttingen. After doing one year each as visiting professor at Princeton University and University of Marseille, he was professor of physics at the University of Illinois at Urbana-Champaign for six years until 1966.

After that and until his retirement he held a chair for theoretical physics at the University of Hamburg.

In 1965 he founded the journal Communications in Mathematical Physics, which he guided as Chief Editor for eight years.

He was awarded the Max Planck medal in 1970 and the Henri Poincaré Prize of the International Association of Mathematical Physics in 1997.


It was reported by SZ Gedenken that Haag died on 5 January 2016 at the age of 93.

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