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Petr Hořava (physicist)
Petr Hořava (born 1963 in Prostějov) is a Czech string theorist. He is a professor of physics in the Berkeley Center for Theoretical Physics at the University of California, Berkeley, where he teaches courses on quantum field theory and string theory. Hořava is a member of the theory group at Lawrence Berkeley National Laboratory. Work Hořava is known for his articles written with Edward Witten about the Hořava–Witten domain walls in M-theory. These articles demonstrated that the ten-dimensional heterotic E_8 \times E_8 string theory could be produced from 11-dimensional M-theory by making one of the dimensions have edges (the domain walls). This discovery provided crucial support for the conjecture that all string theories could arise as limits of a single higher-dimensional theory. Hořava is less well known for his discovery of D-branes, usually attributed to Jin Dai, Robert Leigh and Joseph Polchinski, who discovered them independently, also in 1989. In 2009, Ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prostějov
Prostějov (; ) is a city in the Olomouc Region of the Czech Republic. It has about 43,000 inhabitants. The city is historically known for its fashion industry. The historic city centre is well preserved and is protected as an urban monument zone. '' AČR'' special forces unit 601. skss is based in Prostějov. Administrative division Prostějov consists of seven municipal parts (in brackets population according to the 2021 census): *Prostějov (34,447) *Čechovice (1,584) * Čechůvky (143) *Domamyslice (1,089) *Krasice (2,694) *Vrahovice (3,372) *Žešov (337) Etymology The original name of Prostějov was Prostějovice. The name was derived from the personal name Prostěj (a variant of the name Prostimír), meaning "the village of Prostěj's people". After the village was promoted to a town, the name changed to Prostějov. Geography Prostějov is located about southwest of Olomouc and northeast of Brno. It lies mostly in a flat agricultural landscape of the Upper Mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D-branes
In string theory, D-branes, short for Dirichlet membrane, are a class of extended objects upon which open string (physics), strings can end with Dirichlet boundary conditions, after which they are named. D-branes are typically classified by their spatial dimension, which is indicated by a number written after the ''D.'' A D0-brane is a single point, a D1-brane is a line (sometimes called a "D-string"), a D2-brane is a plane, and a D25-brane fills the highest-dimensional space considered in bosonic string theory. There are also instantonic D(−1)-branes, which are localized in both space and time. Discovery D-branes were discovered by Jin Dai, Robert Leigh (physicist), Robert Leigh, and Joseph Polchinski, and independently by Petr Hořava (physicist), Petr Hořava, in 1989. In 1995, Polchinski identified D-branes with black p-brane solutions of supergravity, a discovery that triggered the Second Superstring Revolution, second superstring revolution and led to both Holographic pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living People
Purpose: Because living persons may suffer personal harm from inappropriate information, we should watch their articles carefully. By adding an article to this category, it marks them with a notice about sources whenever someone tries to edit them, to remind them of WP:BLP (biographies of living persons) policy that these articles must maintain a neutral point of view, maintain factual accuracy, and be properly sourced. Recent changes to these articles are listed on Special:RecentChangesLinked/Living people. Organization: This category should not be sub-categorized. Entries are generally sorted by family name In many societies, a surname, family name, or last name is the mostly hereditary portion of one's personal name that indicates one's family. It is typically combined with a given name to form the full name of a person, although several give .... Maintenance: Individuals of advanced age (over 90), for whom there has been no new documentation in the last ten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Czech Physicists
Czech may refer to: * Anything from or related to the Czech Republic, a country in Europe ** Czech language ** Czechs, the people of the area ** Czech culture ** Czech cuisine * One of three mythical brothers, Lech, Czech, and Rus *Czech (surname) *Czech, Łódź Voivodeship, Poland *Czechville, Wisconsin, unincorporated community, United States See also * Čech, a surname * Czech lands * Czechoslovakia * List of Czechs * * * Check (other) * Czechoslovak (other) * Czech Republic (other) * Czechia (other) Czechia is the official short form name of the Czech Republic. Czechia may also refer to: * Historical Czech lands *Czechoslovakia (1918–1993) *Czech Socialist Republic (1969–1990) *Protectorate of Bohemia and Moravia (1939–1945) See also ... {{disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
String Theorists
This is a list of string theory topics. String theory * String (physics), Strings * Nambu–Goto action * Polyakov action * Bosonic string theory * Superstring theory ** Type I string ** Type II string *** Type IIA string theory *** Type IIB string theory ** Heterotic string * N=2 superstring * M-theory ** Matrix theory (physics), Matrix theory ** Introduction to M-theory * F-theory * String field theory * Matrix string theory * Nonlinear sigma model * Tachyon condensation * RNS formalism * String theory landscape * History of string theory ** First superstring revolution ** Second superstring revolution String duality * T-duality * S-duality * U-duality * Montonen–Olive duality * Mysterious duality Particles and fields * Graviton * Dilaton * Tachyon * Ramond–Ramond field * Kalb–Ramond field * Magnetic monopole Membrane (M-theory), Branes * D-brane * S-brane * Black brane * Black holes * Black string * Brane cosmology * Quiver diagram * Hanany–Witten transit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1963 Births
Events January * January 1 – Bogle–Chandler case: Commonwealth Scientific and Industrial Research Organisation scientist Dr. Gilbert Bogle and Mrs. Margaret Chandler are found dead (presumed poisoned), in bushland near the Lane Cove River, Sydney, Australia. * January 2 – Vietnam War – Battle of Ap Bac: The Viet Cong win their first major victory. * January 9 – A January 1963 lunar eclipse, total penumbral lunar eclipse is visible in the Americas, Europe, Africa and Asia, and is the 56th lunar eclipse of Lunar Saros 114. Gamma has a value of −1.01282. It occurs on the night between Wednesday, January 9 and Thursday, January 10, 1963. * January 13 – 1963 Togolese coup d'état: A military coup in Togo results in the installation of coup leader Emmanuel Bodjollé as president. * January 17 – A last quarter moon occurs between the January 1963 lunar eclipse, penumbral lunar eclipse and the Solar eclipse of January 25, 1963, annular solar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K-theory (physics)
In string theory, K-theory classification refers to a conjectured application of K-theory (in abstract algebra and algebraic topology) to superstrings, to classify the allowed Ramond–Ramond field strengths as well as the charges of stable D-branes. In condensed matter physics K-theory has also found important applications, specially in the topological classification of topological insulators, superconductors and stable Fermi surfaces (, ). History This conjecture, applied to D-brane charges, was first proposed by . It was popularized by who demonstrated that in type IIB string theory arises naturally from Ashoke Sen's realization of arbitrary D-brane configurations as stacks of D9-brane, D9 and anti-D9-branes after tachyon condensation. Such stacks of branes are inconsistent in a non-torsion Kalb–Ramond field, Neveu–Schwarz (NS) 3-form background, which, as was highlighted by , complicates the extension of the K-theory classification to such cases. suggested a soluti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Relativity
General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the differential geometry, geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General theory of relativity, relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time in physics, time, or four-dimensional spacetime. In particular, the ''curvature of spacetime'' is directly related to the energy and momentum of whatever is present, including matter and radiation. The relation is specified by the Einstein field equations, a system of second-order partial differential equations. Newton's law of universal gravitation, which describes gravity in classical mechanics, can be seen as a prediction of general relativity for the almost flat spacetime geometry around stationary mass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Polchinski
Joseph Gerard Polchinski Jr. (; May 16, 1954 – February 2, 2018) was an American theoretical physicist and string theorist. Biography Polchinski was born in White Plains, New York, the elder of two children to Joseph Gerard Polchinski Sr. (1929–2002), a financial consultant and manager, and Joan (née Thornton), an office worker and homemaker. Polchinski was primarily of Irish descent with his paternal grandfather being Polish. Polchinski graduated from Canyon del Oro High School in Tucson, Arizona, in 1971. He obtained his B.S. degree from Caltech in 1975, and his Ph.D. from the University of California, Berkeley, in 1980 under the supervision of Stanley Mandelstam. He did not publish any papers as a graduate student. After postdoctoral positions at SLAC (1980–82) and Harvard (1982–84) he was a professor at the University of Texas at Austin from 1984 to 1992. From 1992 to March 2017 he was a professor in the Physics Department at the University of California, Santa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Leigh (physicist)
Robert Graham Leigh is a Canadian physicist working on string theory. Biography Leigh obtained his B.Sc. degree from the University of Guelph in 1986, and his Ph.D. from the University of Texas at Austin in 1991, working with Joe Polchinski. After postdoctoral positions at Santa Cruz and Rutgers, he has been a professor at the University of Illinois at Urbana-Champaign since 1996. Since 2007, he has been a Fellow of the American Physical Society. retrieved 2014-12-14. Leigh discovered, in association with Jin Dai and , an important class of extended objects in |
Heterotic String
In string theory, a heterotic string is a closed string (or loop) which is a hybrid ('heterotic') of a superstring and a bosonic string. There are two kinds of heterotic superstring theories, the heterotic SO(32) and the heterotic E8 × E8, abbreviated to HO and HE. Apart from that there exist seven more heterotic string theories which are not supersymmetric and hence are only of secondary importance in most applications. Heterotic string theory was first developed in 1985 by David Gross, Jeffrey Harvey, Emil Martinec, and Ryan Rohm (the so-called "Princeton string quartet"), in one of the key papers that fueled the first superstring revolution. Overview In string theory, the left-moving and the right-moving excitations of strings are completely decoupled for a closed string, and it is possible to construct a string theory whose left-moving (counter-clockwise) excitations are treated as a bosonic string propagating in ''D'' = 26 dimensions, while the righ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
