Christian Fronsdal

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Christian Fronsdal (actually Frønsdal * 1931 ) is a from Norway derived American theoretical physicist .

Life

Fronsdal received his PhD in 1957 from the University of California, Los Angeles (UCLA) with Robert Finkelstein ( On the Theory of Higher Spin Fields, with Application to Fermi Decay ). Then he was at CERN and from the 1960s at UCLA, where he became a professor. In the early 1960s he organized two international schools for theoretical physics in Bergen , where he also studied in the early 1950s.

He deals with elementary particle physics (for example Regge-Pol theory in the 1960s), gravitation, quantum field theory (for example of massless particles, in curved spacetime), mathematical physics. Together with Moshé Flato , Daniel Sternheimer, Francois Bayen and André Lichnerowicz , he introduced deformation quantization in 1978.

Fronsdal dealt extensively with singletons . These are fields introduced by Paul Dirac as fundamental representations of the group SO (3,2), especially in anti-de-sitter rooms (AdS rooms), where they are located on the three-dimensional edge of AdS spacetime according to the investigations by Fronsdal . In 1988 they appeared in the supermembrane theories of S7 compactification (7-dimensional sphere) of supergravity from 11 dimensions to 4 dimensions according to Michael Duff , Eric Bergshoeff , Ergin Sezgin, where they found particles on the world sheet of the "super membrane at the end of the universe " , the three-dimensional edge of four-dimensional space-time. According to the holographic principle, they determine the physics in the volume of space-time.

In 1959, independently of Martin Kruskal (as well as George Szekeres in 1961 and David Finkelstein ), he discovered the Kruskal coordinates in the Schwarzschild solution of general relativity . Kruskal himself found this in the mid-1950s and showed it to John Archibald Wheeler , who only later recognized its importance and presented it in 1959.

Fonts

  • Editor: Essays on Supersymmetry , Reidel / Kluwer 1986
  • Editor: The Many Body Problem (First Bergen International School of Physics 1961), Benjamin, New York 1962
  • Editor: Weak interactions and topics in dispersion physics (2nd Bergen International School of Physics 1962), Benjamin 1963
  • with Flato and Kimball Milton he also edited selected works by Julian Schwinger , who like him was a professor at UCLA.

Web links

Individual evidence

  1. ^ Mathematics Genealogy Project
  2. ↑ Fronsdal, F. Bayen, Flato, Lichnerowicz, Sternheimer Deformation Theory and Quantization Part I (Deformations and Symplectic Structures), Annals of Physics, Volume 111, 1978, p. 61, Part 2 (Physical Applications), p. 111
  3. ↑ See Duff A layman's guide to M-theory in Alexiades, Siopsis Trends in mathematical physics , 1998
  4. ^ Fronsdal Completion and Embedding of the Schwarzschild Solution , Phys. Rev., Vol. 116, 1959, p. 778
  5. ^ Werner Israel Dark stars - the evolution of an idea , in Hawking, Israel 300 years of Gravitation , Cambridge University Press 1987
personal data
SURNAME Fronsdal, Christian
BRIEF DESCRIPTION American physicist
DATE OF BIRTH 1931