Oskar Klein

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Oskar Klein
Oskar Klein.jpg
Oskar Benjamin Klein (1894–1977). Photograph taken at the Göttingen Bohr-Festspiele, June 1922.
Born September 15, 1894 (1894-09-15)
Mörby, Sweden
Died February 7, 1977(1977-02-07) (aged 82)
Stockholm, Sweden
Nationality Swedish
Fields Physicist
Institutions Copenhagen
University of Michigan
Lund University
University College of Stockholm
Alma mater Nobel Institute
University College of Stockholm
Doctoral students David M. Dennison
Known for Kaluza–Klein theory
Klein–Gordon equation
Rydberg–Klein–Rees method
Influences Svante Arrhenius
Notable awards Max Planck Medal, 1959
Signature

Oskar Benjamin Klein (September 15, 1894 – February 5, 1977) was a Swedish theoretical physicist.[1]

Klein was born in Danderyd outside Stockholm, son of the chief rabbi of Stockholm, Gottlieb Klein from Humenné in Slovakia and Antonie (Toni) Levy. He became a student of Svante Arrhenius at the Nobel Institute at a young age and was on the way to Jean-Baptiste Perrin in France when World War I broke out and he was drafted into the military.

From 1917, he worked a few years with Niels Bohr in the University of Copenhagen and received his doctoral degree at the University College of Stockholm (now Stockholm University) in 1921. In 1923, he received a professorship at University of Michigan in Ann Arbor and moved there with his recently wedded wife, Gerda Koch from Denmark. Klein returned to Copenhagen in 1925, spent some time with Paul Ehrenfest in Leiden, then became docent at Lund University in 1926 and in 1930 accepted the offer of the professorial chair in physics at the Stockholm University College, which had previously been held by Erik Ivar Fredholm until his death in 1927. Klein was awarded the Max Planck Medal in 1959. He retired as professor emeritus in 1962.

Klein is credited for inventing the idea, part of Kaluza–Klein theory, that extra dimensions may be physically real but curled up and very small, an idea essential to string theory / M-theory.

In 1938, he proposed a boson-exchange model for charge-charging weak interactions (radioactive decay), a few years after a similar proposal by Hideki Yukawa. His model was based on a local isotropic gauge symmetry and anticipated the later successful theory of Yang-Mills.

The Oskar Klein Memorial Lecture, held annually at the University of Stockholm, has been named after him. The Oskar Klein Centre for Cosmoparticle Physics in Stockholm, Sweden is also in his honor.

Oskar Klein is the grandfather of Helle Klein.

Oskar Klein's tomb at Judiska norra begravningsplatsen in Solna (grey stone to the right).

See also[edit]

References[edit]

  1. ^ Deser, Stanley (June 1977). "Oskar Klein". Physics Today 30 (6): 67–68. Bibcode:1977PhT....30f..67D. doi:10.1063/1.3037609. 

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