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Jackiw
Roman Wladimir Jackiw (; ; November 8, 1939 – June 14, 2023) was a Polish-born American theoretical physicist and Dirac Medallist. Biography Born in Lubliniec, Poland in 1939 to a Ukrainian family, the family later moved to Austria and Germany before settling in New York City when Jackiw was about 10. Jackiw earned his undergraduate degree from Swarthmore College and his PhD from Cornell University in 1966 under Hans Bethe and Kenneth Wilson. He was a professor at the Massachusetts Institute of Technology Center for Theoretical Physics from 1969 until his retirement. He retained his affiliation in emeritus status in 2019. Jackiw co-discovered the chiral anomaly, which is also known as the Adler–Bell–Jackiw anomaly. In 1969, he and John Stewart Bell published their explanation, which was later expanded and clarified by Stephen L. Adler, of the observed decay of a neutral pion into two photons. This decay is forbidden by a symmetry of classical electrodynamics, but Bell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stefan Jackiw
Stefan Jackiw (; born 1985) is an American classical violinist. Biography Stefan Jackiw was born in Boston, Massachusetts. His parents are both prominent physics professors, now retired with emeritus status. His mother, So-Young Pi, was the daughter of Korean poet and essayist Pi Chun-deuk. She was on the faculty at Boston University. His father, Roman Jackiw, was born in Poland to a Ukrainian family. He was on the faculty at MIT. Jackiw started playing the violin at the age of four when he was given a small instrument that a child of family friends had outgrown. As a young child, he took Suzuki method lessons at the Longy School of Music. Subsequently, his teachers have included Zinaida Gilels, whom he credits with providing a secure technical foundation, the French violinist Michèle Auclair, with whom he began studying at age 12, and former Cleveland Quartet first violinist Donald Weilerstein. Unlike many young musicians, who attend schools for the arts or are home-sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiral Anomaly
In theoretical physics, a chiral anomaly is the anomalous nonconservation of a chiral current. In everyday terms, it is analogous to a sealed box that contained equal numbers of left and right-handed bolts, but when opened was found to have more left than right, or vice versa. Such events are expected to be prohibited according to classical conservation laws, but it is known there must be ways they can be broken, because we have evidence of charge–parity non-conservation ("CP violation"). It is possible that other imbalances have been caused by breaking of a ''chiral law'' of this kind. Many physicists suspect that the fact that the observable universe contains more matter than antimatter is caused by a chiral anomaly. Research into chiral symmetry breaking laws is a major endeavor in particle physics research at this time. Informal introduction The chiral anomaly originally referred to the anomalous decay rate of the neutral pion, as computed in the current algebra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theta Vacuum
In quantum field theory, the theta vacuum is the semi-classical vacuum state of non- abelian Yang–Mills theories specified by the vacuum angle ''θ'' that arises when the state is written as a superposition of an infinite set of topologically distinct vacuum states. The dynamical effects of the vacuum are captured in the Lagrangian formalism through the presence of a ''θ''-term which in quantum chromodynamics leads to the fine tuning problem known as the strong CP problem. It was discovered in 1976 by Curtis Callan, Roger Dashen, and David Gross, and independently by Roman Jackiw and Claudio Rebbi. Yang–Mills vacuum Topological vacua The semi-classical vacuum structure of non-abelian Yang–Mills theories is often investigated in Euclidean spacetime in some fixed gauge such as the temporal gauge A_0 = 0. Classical ground states of this theory have a vanishing field strength tensor which corresponds to pure gauge configurations A_i = i\Omega \nabla_i \Omega^, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackiw–Teitelboim Gravity
Jackiw–Teitelboim gravity, also known as the ''R'' = ''T'' model, or simply JT gravity (after physicists Roman Jackiw and Claudio Teitelboim), is a theory of gravity with dilaton coupling in one spatial and one time dimension. It should not be confused with the CGHS model or Liouville gravity. The action is given by :S = \frac\int d^2x\, \sqrt\, \Phi \left( R - \Lambda \right) The metric in this case is more amenable to analytical solutions than the general 3+1D case though a canonical reduction for the latter has recently been obtained. For example, in 1+1D, the metric for the case of two mutually interacting bodies can be solved exactly in terms of the Lambert W function, even with an additional electromagnetic field. Varying with respect to Φ yields R=\Lambda on shell, which means the metric is either Anti-de Sitter space or De Sitter space, depending upon the sign of Λ. See also References Theory of relativity {{relativity-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirac Medal (ICTP)
The Dirac Medal of the ICTP is given each year by the International Centre for Theoretical Physics (ICTP) in honour of physicist Paul Dirac. The award, announced each year on 8 August (Dirac's birthday), was first awarded in 1985. An international committee of distinguished scientists selects the winners from a list of nominated candidates. The Committee invites nominations from scientists working in the fields of theoretical physics or mathematics. The Dirac Medal of the ICTP is not awarded to Nobel Laureates, Fields Medalists, or Wolf Prize winners. However, several Dirac Medallists have subsequently won one of these awards. The medallists receive a prize of US$5,000. Recipients See also * List of physics awards * List of awards named after people This is a list of awards that are named after people. A B C D E F G H I J K L M N O P R S T U–V W Y Z See also *Lists of awards *List of eponyms *List of awards na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIT Center For Theoretical Physics
The MIT Center for Theoretical Physics (CTP) is the hub of theoretical nuclear physics, particle physics, and quantum information research at MIT. It is a subdivision of MIT Laboratory for Nuclear Science and Department of Physics. Research CTP activities range from string theory and cosmology at the highest energies down through unification and beyond-the-standard-model physics, through the standard model, to QCD, hadrons, quark matter, and nuclei at the low energy scale. Members of the CTP are also currently working on quantum computation and on energy policy. The breadth and depth of research in nuclear, particle, string, and gravitational physics at the CTP makes it a unique environment for researchers in these fields. Members In addition to the 15 MIT faculty members working in the CTP, at any one time there are roughly a dozen postdoctoral fellows, and as many, or more, long-term visitors working at the postdoctoral or faculty level. The CTP supports 25-35 MIT graduate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Stewart Bell
John Stewart Bell (28 July 1928 – 1 October 1990) was a physicist from Northern Ireland and the originator of Bell's theorem, an important theorem in quantum mechanics, quantum physics regarding hidden-variable theory, hidden-variable theories. In 2022, the Nobel Prize in Physics was awarded to Alain Aspect, John Clauser, and Anton Zeilinger for work on Bell test, Bell inequalities and the Aspect's experiment, experimental validation of Bell's theorem. Biography Early life and work Bell was born in Belfast, Northern Ireland to a working class family. Due to financial hardship, neither parent and none of his three older siblings completed high school, typically dropping out of school by age 14 to work. When he was 11 years old, he decided to be a scientist, and encouraged by his mother, at 16 he graduated from Belfast Technical High School. Then in an exceptionally rare occurrence for someone of his background, Bell attended the Queen's University of Belfast, where, in 194 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andrew Strominger
Andrew Eben Strominger (; born 1955) is an American theoretical physicist who is the director of Harvard's Center for the Fundamental Laws of Nature. He has made significant contributions to quantum gravity and string theory. These include his work on Calabi–Yau compactification and topology change in string theory, and on the stringy origin of black hole entropy. He is a senior fellow at the Society of Fellows, and is the Gwill E. York Professor of Physics. Education Strominger received his bachelor's degree at Harvard College in 1977 and his master's degree at the University of California, Berkeley. He then received his PhD at MIT in 1982 under the supervision of Roman Jackiw. Prior to joining Harvard as a professor in 1997, he held a faculty position at the University of California, Santa Barbara. He is the author of over 200 publications. Research Notable contributions * a paper with Cumrun Vafa that explains the microscopic origin of the black hole entropy, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Bethe
Hans Albrecht Eduard Bethe (; ; July 2, 1906 – March 6, 2005) was a German-American physicist who made major contributions to nuclear physics, astrophysics, quantum electrodynamics and solid-state physics, and received the Nobel Prize in Physics in 1967 for his work on the theory of stellar nucleosynthesis. For most of his career, Bethe was a professor at Cornell University.James C. Keck Collected Works and Biography () has the class notes taken by one of Bethe's students at Cornell from the graduate courses on Nuclear Physics and on Applications of Quantum Mechanics he taught in the spring of 1947. In 1931, Bethe developed the Bethe ansatz, which is a method for finding the exact solutions for the Eigenvalue, eigenvalues and Eigenvector, eigenvectors of certain one-dimensional quantum many-body models. In 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Lykken
Joseph David Lykken ( ) is an American theoretical physicist at the Fermi National Accelerator Laboratory and, from July 1, 2014 to Sept 6, 2022, he was the Deputy Director of Fermilab. He is currently Director of Fermilab's Quantum Division. Background and education Lykken was born in Minneapolis, Minnesota. He is the son of David T. Lykken, noted psychologist, behavioral geneticist, and twin researcher. Lykken received his Ph.D. in 1982 from M.I.T. He arrived at Fermilab in 1989, where he worked in the Fermilab Theory Division, and as a collaborator of the Compact Muon Solenoid (CMS) experiment at the CERN Large Hadron Collider. Research In 1983 Lykken's paper with Lawrence Hall and Steven Weinberg helped establish the minimal supersymmetric standard model as a leading paradigm for physics beyond the Standard Model. In 1996 Lykken proposed "weak scale superstrings," which posited extra dimensions of space within the reach of particle colliders, such as the Fermilab Tevatron, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dannie Heineman Prize For Mathematical Physics
Dannie Heineman Prize for Mathematical Physics is an award given each year since 1959 jointly by the American Physical Society and American Institute of Physics. It is established by the Heineman Foundation in honour of Dannie Heineman. As of 2010, the prize consists of US$10,000 and a certificate citing the contributions made by the recipient plus travel expenses to attend the meeting at which the prize is bestowed. Past Recipients Source: American Physical Society *2025 Samson Shatashvili *2024 David C. Brydges *2023 Nikita Nekrasov *2022 Antti Kupiainen and Krzysztof Gawędzki *2021 Joel Lebowitz *2020 Svetlana Jitomirskaya *2019 T. Bill Sutherland, Francesco Calogero and Michel Gaudin *2018 Barry Simon *2017 Carl M. Bender *2016 Andrew Strominger and Cumrun Vafa *2015 Pierre Ramond *2014 Gregory W. Moore *2013 Michio Jimbo and Tetsuji Miwa *2012 Giovanni Jona-Lasinio *2011 Herbert Spohn *2010 Michael Aizenman *2009 Carlo Becchi, Alain Rouet, Raymond Sto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
