Lars Tore Hedin (February 4, 1930–2002) was a Swedish physicist working on condensed matter physics and emeritus professor of Lund University.
[1][2] Hedin earned a grant to work at Argonne National Laboratory in United States between 1962 and 1964, going back to Sweden's Chalmers University of Technology afterwards, where Lundqvist had had been awarded a professorship.
[2] Based on his work at Argonne, he wrote his thesis titled "Application of Many-Body Theory to the One-Electron Problem of Atoms, Molecules and Solids" on 30 October 1965.
[2] In 1994, he accepted the four year position of director of the Max Planck Institute for Solid State Research in Stuttgart, Germany.
This is clearly in violation of the Pauli principle, but I will try to explore where this idea can lead.Hedin also worked in X-ray absorption fine structure (XAFS), introducing the local density approximation for the GW self energy.