Eyvind Hugo Wichmann (May 30, 1928 – February 16, 2019)[1][2] was an American theoretical physicist.
Wichmann studied in Finland (Institute of Technology, Helsinki, diploma 1950) and finished his master studies 1953 at the Columbia University, following that with his PhD 1956.
From 1955 to 1957 he was at the Institute for Advanced Study.
His research covers quantum field theory and quantum electrodynamics (both concrete problems of particle physics as well as axiomatic quantum field theory, in which he, in 1975, made the connection to the Tomita–Takesaki theory).
He was a member of the Finnish Academy of Science and Letters and a Fellow of the American Physical Society.