Abraham Klein (physicist)

Abraham Klein ( born January 10, 1927 in Brooklyn, † 20 January 2003) was an American theoretical physicist.

Klein studied at Brooklyn College ( BA 1947) and Harvard University, his master's degree where he earned his doctorate in 1948 and 1950 Julian Schwinger. In 1955 he became associate professor at the University of Pennsylvania, where in 1958 he received a full professorship in 1994 and retired.

Klein studied models of collective behavior in finite many-body systems, in particular nuclear physics, for example in Bosonenmodellen and in an extension of the Hartree -Fock method with Robert Kerman ( Kerman - Klein method ) In the 1980s, he worked among others with the Interacting Boson model and in the 1970s with quantum field theory in strong fields ( with Johann Rafelski ).

In the early 1950s he was involved as assistant chair in early calculations of quantum electrodynamics in atomic physics, in collaboration with Schwinger and Robert Karplus, also assistant chair.

He was Sloan Fellow and Guggenheim Fellow, Honorary Doctor of the Goethe University in Frankfurt am Main and Alexander von Humboldt Senior Scientist. Klein was a Fellow of the American Physical Society.

He was married and had two daughters.