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|Bryce Seligman DeWitt|
|Born||January 8, 1923
|Died||September 23, 2004 (aged 81)
|Institutions||Institute for Advanced Study
University of North Carolina at Chapel Hill
University of Texas at Austin
|Alma mater||Harvard University|
|Notable awards||Dirac Prize
Bryce Seligman DeWitt (January 8, 1923 – September 23, 2004) was a theoretical physicist renowned for advancing gravity and field theories.
He systematically approached the quantization of general relativity, in particular, developed canonical quantum gravity and manifestly covariant methods that use the heat kernel. B. DeWitt formulated the Wheeler–DeWitt equation for the wavefunction of the Universe with John Archibald Wheeler and advanced the formulation of the Hugh Everett's many-worlds interpretation of quantum mechanics. With his student Larry Smarr he originated the field of numerical relativity.
He received his bachelor's, master's and doctoral degrees from Harvard University. His Ph.D. (1950) supervisor was Julian S. Schwinger. Afterwards he worked at the Institute for Advanced Study, the University of North Carolina at Chapel Hill and the University of Texas at Austin. He was awarded the Dirac Prize in 1987, the American Physical Society's Einstein Prize in 2005, and was a member of the National Academy of Sciences and the American Academy of Arts and Letters.
He was born Carl Bryce Seligman but he and his three brothers added "DeWitt" from their mother's side of the family, at the urging of their father, in 1950. (This is similar to Spanish naming customs, where a person bears two surnames, one being from their father and the other from their mother. 20 years later this change of name so angered Felix Bloch that he blocked DeWitt's appointment to Stanford University and DeWitt instead moved to Austin, Texas.) He served in World War II as a naval aviator. He was married to accomplished mathematical physicist Cécile DeWitt-Morette. He died September 23, 2004 from pancreatic cancer at the age of 81. He is buried in France, and was survived by his wife and four daughters.
- Bryce DeWitt, Dynamical theory of groups and fields, Gordon and Breach, New York, 1965
- Bryce DeWitt, R. Neill Graham, eds., The Many-Worlds Interpretation of Quantum Mechanics, Princeton Series in Physics, Princeton University Press (1973), ISBN 0-691-08131-X.
- S. M. Christensen, ed., Quantum theory of gravity. Essays in honor of the 60th birthday of Bryce S. DeWitt, Adam Hilger, Bristol, 1984.
- Bryce DeWitt, Supermanifolds, Cambridge University Press, Cambridge, 1985.
- Bryce DeWitt, The Global Approach to Quantum Field Theory, The International Series of Monographs on Physics, Oxford University Press (2003), ISBN 978-0-19-851093-2.
- "Sopra un raggio di luce", Di Renzo Editore, Roma, 2005.
In popular culture 
- It has been suggested that Booker DeWitt, the protagonist of BioShock Infinite, is named for Bryce DeWitt. A central aspect of the game's narrative concerns the existence of many parallel worlds.
- In Bucky O'Hare there is a child genius named Willy DuWitt, who creates a portal to an alternate universe. This seems to reference Bryce DeWitt's involvement with the many-worlds interpretation of quantum mechanics.
Further reading 
- David Deutsch, Christopher Isham, Gregory Vilkovisky (2005). "Bryce Seligman DeWitt". Physics Today 58 (3): 84. Bibcode:2005PhT....58c..84D. doi:10.1063/1.1897570.
- University of Texas obituary
- INSPIRE-HEP list of Dewitt's most famous papers
- Dirac Prize citation, International Centre for Theoretical Physics
- Einstein Prize citation, American Physical Society
- Oral History interview transcript with Bryce DeWitt February 28, 1995, American Institute of Physics, Niels Bohr Library and Archives
- Gaina Alex: The Quantum Gravity Simposim in Moscow, 1987 Gaina Alex: ГОСТИННАЯ:ФОРУМ: Александр Александров *Сборник рассказов*:РЕПРЕССИРОВАННАЯ НАУКА (PURGED SCIENCE)
- National Academy of Sciences Biographical Memoir