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String field theory (SFT) is a formalism in string theory in which the dynamics of relativistic strings is reformulated in the language of quantum field theory. This is accomplished at the level of perturbation theory by finding a collection of vertices for joining and splitting strings, as well as string propagators, that give a Feynman diagram-like expansion for string scattering amplitudes. In most string field theories, this expansion is encoded by a classical action found by second-quantizing the free string and adding interaction terms. As is usually the case in second quantization, a classical field configuration of the second-quantized theory is given by a wave function in the original theory. In the case of string field theory, this implies that a classical configuration, usually called the string field, is given by an element of the free string Fock space.
Nathan "Nati" Seiberg is an Israeli American theoretical physicist who works on quantum field theory and string theory. He is currently a professor at the Institute for Advanced Study in Princeton, New Jersey, United States.
In physics, the Landau pole is the momentum scale at which the coupling constant of a quantum field theory becomes infinite. Such a possibility was pointed out by the physicist Lev Landau and his colleagues. The fact that couplings depend on the momentum scale is the central idea behind the renormalization group.
Jeffrey A. Harvey is an American string theorist at the University of Chicago.
Montonen–Olive duality or electric–magnetic duality is the oldest known example of strong–weak duality or S-duality according to current terminology. It generalizes the electro-magnetic symmetry of Maxwell's equations by stating that magnetic monopoles, which are usually viewed as emergent quasiparticles that are "composite", can in fact be viewed as "elementary" quantized particles with electrons playing the reverse role of "composite" topological solitons; the viewpoints are equivalent and the situation dependent on the duality. It was later proven to hold true when dealing with a N = 4 supersymmetric Yang–Mills theory. It is named after Finnish physicist Claus Montonen and British physicist David Olive after they proposed the idea in their academic paper Magnetic monopoles as gauge particles? where they state:
There should be two "dual equivalent" field formulations of the same theory in which electric (Noether) and magnetic (topological) quantum numbers exchange roles.
Purdy's Wharf is an office complex in Halifax, Nova Scotia, Canada. Built over the water at the edge of Halifax Harbour and resting on pilings, it consists of two office towers, and a smaller office structure called Purdy's Landing. The complex is located along the Halifax Waterfront Boardwalk.
Tamiaki Yoneya is a Japanese physicist.
Igor R. Klebanov is an American theoretical physicist. Since 1989, he has been a faculty member at Princeton University where he is currently a Eugene Higgins Professor of Physics and the director of the Princeton Center for Theoretical Science. In 2016, he was elected to the National Academy of Sciences. Since 2022, he is the director of the Simons Collaboration on Confinement and QCD Strings.
The Dokshitzer–Gribov–Lipatov–Altarelli–Parisi (DGLAP) evolution equations are equations in QCD describing the variation of parton distribution functions with varying energy scales. Experimentally observed scaling violation in deep inelastic scattering is important evidence for the correctness of the equations and of QCD in general. The equations were first published in the western world by Guido Altarelli and Giorgio Parisi in 1977, and so are still sometimes called the Altarelli–Parisi equations. Only later did it become known that an equivalent formula had been published in Russia by Yuri Dokshitzer in 1977, and by Vladimir Gribov and Lev Lipatov in 1972.
In physics, a renormalon is a particular source of divergence seen in perturbative approximations to quantum field theories (QFT). When a formally divergent series in a QFT is summed using Borel summation, the associated Borel transform of the series can have singularities as a function of the complex transform parameter. The renormalon is a possible type of singularity arising in this complex Borel plane, and is a counterpart of an instanton singularity. Associated with such singularities, renormalon contributions are discussed in the context of quantum chromodynamics (QCD) and usually have the power-like form as functions of the momentum . They are cited against the usual logarithmic effects like .
The Teatro Nacional de Cuba is a theatre building in Havana, Cuba, on Plaza de la Revolución.
Renata Elizaveta Kallosh is a Russian-American theoretical physicist. She is a professor of physics at Stanford University, working there on supergravity, string theory and inflationary cosmology.
Purdy Hill is an unincorporated community in Posey Township, Clay County, Indiana. It is part of the Terre Haute Metropolitan Statistical Area.
WISE 1828+2650 is a possibly binary brown dwarf or rogue planet of spectral class >Y2, located in the constellation Lyra at approximately 32.5 light-years from Earth. It is the "archetypal member" of the Y spectral class.
CBS-0550 is a drug developed by Taisho Pharmaceutical, which acts as a potent and selective cannabinoid CB2 receptor agonist, with 1400x selectivity for CB2 over the related CB1 receptor. Unlike most cannabinoid agonists, CBS-0550 has good solubility in water, and in animal studies it was found to produce analgesic and anti-hyperalgesic effects. A number of related compounds have been developed with similar properties.
Ryan Milton Rohm is an American string theorist. He is one of four physicists known as the Princeton string quartet, and is responsible for the development of heterotic string theory along with David Gross, Jeffrey A. Harvey and Emil Martinec, the other members of the Princeton String Quartet.
Peter Christopher West, born on 4 December 1951, is a British theoretical physicist at King's College, London and a fellow of the Royal Society.
Pemiscot Township is an inactive township in Pemiscot County, in the U.S. state of Missouri.
Charles Russell "Chase" Purdy III is an American professional stock car racing driver. He competes full-time in the NASCAR Craftsman Truck Series, driving the No. 77 Chevrolet Silverado for Spire Motorsports.
Brock Purdy is an American football quarterback for the San Francisco 49ers of the National Football League (NFL). He played college football for the Iowa State Cyclones and was selected by the 49ers with the final pick in the 2022 NFL draft, becoming that year's Mr. Irrelevant.
