Article ID: CBB001202209

The Education of Walter Kohn and the Creation of Density Functional Theory (2014)

unapi

The theoretical solid-state physicist Walter Kohn was awarded one-half of the 1998 Nobel Prize in Chemistry for his mid-1960s creation of an approach to the many-particle problem in quantum mechanics called density functional theory (DFT). In its exact form, DFT establishes that the total charge density of any system of electrons and nuclei provides all the information needed for a complete description of that system. This was a breakthrough for the study of atoms, molecules, gases, liquids, and solids. Before DFT, it was thought that knowledge of the vastly more complicated many-electron wave function was essential for a complete description of such systems. Today, 50 years after its introduction, DFT (in one of its approximate forms) is the method of choice used by most scientists to calculate the physical properties of materials of all kinds. In this paper, I present a biographical essay of Kohn’s educational experiences and professional career up to and including the creation of DFT. My account begins with Kohn’s student years in Austria, England, and Canada during World War II and continues with his graduate and postgraduate training at Harvard University and Niels Bohr’s Institute for Theoretical Physics in Copenhagen. I then study the research choices he made during the first 10 years of his career (when he was a faculty member at the Carnegie Institute of Technology and a frequent visitor to the Bell Telephone Laboratories) in the context of the theoretical solid-state physics agenda of the late 1950s and early 1960s. Subsequent sections discuss his move to the University of California, San Diego, identify the research issue which led directly to DFT, and analyze the two foundational papers of the theory. The paper concludes with an explanation of how the chemists came to award “their” Nobel Prize to the physicist Kohn and a discussion of why he was unusually well suited to create the theory in the first place.

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Authors & Contributors
Kauffman, George B.
Menzel, Julia Harriet
Michael O'Keeffe
Jeffrey Sellar
Ray Withers
Stephen Hyde
Concepts
Biographies
Chemistry
Nobel Prizes
Atomic, nuclear, and particle physics
Physics
Theoretical physics
Time Periods
20th century, early
20th century, late
20th century
19th century
21st century
18th century
Places
United States
England
Italy
Australia
Scotland
Netherlands
Institutions
Johns Hopkins University, Baltimore
Carnegie Institute of Technology
Massachusetts Institute of Technology, MIT
Cavendish Laboratory
California Institute of Technology
American Association for the Advancement of Science
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