After graduating from Pelham Memorial High School in 1955,[3] Jaffe attended Princeton University as an undergraduate obtaining a degree in chemistry in 1959, and later Clare College, Cambridge, as a Marshall Scholar, obtaining a degree in mathematics in 1961. He then returned to Princeton, obtaining a doctorate in physics in 1966 with Arthur Wightman. His whole career has been spent teaching mathematical physics and pursuing research at Harvard University. Jaffe was appointed as Professor of Physics in 1970, and had his title changed to Professor of Mathematical Physics in 1974. As part of this transition, Jaffe became a member of the mathematics department. He served as chair from 1987 to 1990.[4]
Jaffe conceived the idea of the Clay Mathematics Institute and its programs, including the employment of research fellows and the Millennium Prizes in mathematics. He served as a founding member, a founding member of the board, and the founding president of that organization.
One of Arthur Jaffe's earliest contributions was his proof, joint with Henry Epstein and Vladimir Glaser, that energy densities in local quantum field theories are always nonpositive.[6]
Constructive Quantum Field Theory
A large amount of Jaffe's work deals with the mathematical construction and proof of results in quantum field theory. Jaffe began his research on the topic in the late 1960s and early 1970s, at which point the only local quantum field theory which had been constructed mathematically was the free field model. In a series of landmark papers, Jaffe and collaborators made great progress in understanding the nature of quantum field theory.[7][8][9][10][11][12] This culminated in the first ever mathematical local quantum field theory with non-linearity and non-trivial scattering.[13] Thus it established the mathematical compatibility of special relativity, quantum theory, and interaction. For this work, Jaffe and James Glimm are acknowledged as the founders of the subject of constructive quantum field theory.
Phase Transitions in Quantum Field Theory
Another notable contribution of Jaffe's is his proof, joint with James Glimm and Thomas Spencer, that quantum field theories can have phase transitions.[14][15] While physicists had conjectured for many years that this phenomenon took place, Jaffe-Glimm-Spencer's work gave the first mathematical proof. This work is also notable for using the formalism of reflection positivity to establish its results, which has since become common practice among researchers studying phase transitions in quantum field theory.[16]
Reflection Positivity
One recurring idea in Jaffe's works is the notion of reflection positivity, which was first introduced by Osterwalder and Schrader while they were Jaffe's post-doctoral fellows. The notion of reflection positivity has served since its inception as a key tool in the quantization of classical Euclidean field theories into relativistic quantum field theories. It also provides a basic tool to study phase transitions both in statistical physics as well as in quantum field theory. Jaffe has made major contributions to the development of this theory, by establishing key examples,[17][18][19][20][21][22][23][24][25] introducing important generalizations,[26][27][28] and providing geometric interpretations.[29][30]
In his later years Arthur Jaffe has made varied contributions to the theory of quantum information, along with postdoctoral researchers Zhengwei Liu, Kaifeng Bu, and students.[36][37][38][39] Notable among these contributions are the introduction of quantum Fourier analysis,[40][41] the study of quantum resources,[42][43][44] quantum error correction,[45] and the introduction of a 3D graphical language for quantum information.[46]
Philosophy of Mathematics and Physics
Jaffe is the author of several essays on the philosophy of mathematics and physics, with a special emphasis on the role of proof and rigor in these subjects.[47][48][49][50] The most influential of these works was his essay with Frank Quinn, which introduced the notion of "Theoretical Mathematics".[51] An issue of the Bulletin of the American Mathematical Society was devoted to responses to this article, written by leading mathematicians.[52]
Awards and honors
Arthur Jaffe is the recipient of numerous awards and honors. In 1979 he was awarded the New York Academy of Science prize in Mathematics and Physics.[53] In 1980 Arthur Jaffe was awarded the Dannie Heineman Prize for Mathematical Physics. In 1990 he was awarded the Medal Collège de France.[54] In 2018 he was awarded the ICCM prize for best mathematical paper in the last five years.[55] In 2020 he was awarded the Science China Mathematics Award for best editor.[53] Jaffe has been an invited speak at many distinguished conferences, including the 1978 International Congress of Mathematicians at Helsinki.[56]
Jaffe was married from 1971 to 1992 to Nora Frances Crow and they had one daughter, Margaret Collins, born in 1986. Jaffe was married to artist Sarah Robbins Warren from 1992 to 2002.
^Jaffe, Arthur; Janssens, Bas (12 June 2015). "Characterization of Reflection Positivity: Majoranas and Spins". Communications in Mathematical Physics. 346 (3): 1021–1050. arXiv:1506.04197v2. doi:10.1007/s00220-015-2545-z.
^Jaffe, Arthur; Janssens, Bas (24 July 2016). "Reflection Positive Doubles". arXiv:1607.07126 [math-ph].
^Jaffe, Arthur; Jäkel, Christian D.; Martinez II, Roberto E. (29 January 2012). "Complex Classical Fields: A Framework for Reflection Positivity". arXiv:1201.6003v2 [math-ph].
^Jaffe, Arthur; Liu, Zhengwei (30 January 2019). "Reflection Positivity and Levin-Wen Models". arXiv:1901.10662v1 [math-ph].
^Jaffe, Arthur; Liu, Zhengwei (6 June 2020). "A Mathematical Picture Language Project". arXiv:2006.03954v1 [math-ph].
^Jaffe, Arthur; Liu, Zhengwei; Wozniakowski, Alex (1 May 2016). "Compressed Teleportation". arXiv:1605.00321v1 [quant-ph].
^Jaffe, Arthur; Liu, Zhengwei; Wozniakowski, Alex (19 November 2016). "Constructive simulation and topological design of protocols". New Journal of Physics. 19 (6). arXiv:1611.06447v2. doi:10.1088/1367-2630/aa5b57.
^Jaffe, Arthur; Liu, Zhengwei; Wozniakowski, Alex (30 April 2016). "Holographic software for quantum networks". Science China Mathematics. 61 (4): 593–626. arXiv:1605.00127v5. doi:10.1007/s11425-017-9207-3.
^Li, Lu; Bu, Kaifeng; Koh, Dax Enshan; Jaffe, Arthur; Lloyd, Seth (12 August 2022). "Wasserstein Complexity of Quantum Circuits". arXiv:2208.06306v1 [quant-ph].
^Jaffe, Arthur (2003). "The Role of Rigorous Proof in Modern Mathematical Thinking". In Hoff Kjeldsen, Tinne (ed.). New Trends in the History and Philosophy of Mathematics. University of Odense Press.
^Jaffe, Arthur (2003). "Interactions between Mathematics and Theoretical Physics". In Hoff Kjeldsen, Tinne (ed.). New Trends in the History and Philosophy of Mathematics. University of Odense Press.
^Jaffe, Arthur; Quinn, Frank (30 June 1993), Theoretical mathematics: Toward a cultural synthesis of mathematics and theoretical physics, arXiv:math/9307227, Bibcode:1993math......7227J
^Atiyah, Michael; Borel, Armand; Chaitin, G. J.; Friedan, Daniel; Glimm, James; Gray, Jeremy J.; Hirsch, Morris W.; MacLane, Saunder; Mandelbrot, Benoit B. (31 March 1994), Responses to Theoretical Mathematics: Toward a cultural synthesis of mathematics and theoretical physics, by A. Jaffe and F. Quinn, arXiv:math/9404229, Bibcode:1994math......4229A
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