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Alexey Andreevich Anselm
Alexey Andreevich Anselm (, 1 July 1934 – 24 August 1998) was a Russian Theoretical physics, theoretical physicist, Doctor of Science, Doctor of Physical and Mathematical Sciences, professor, director (1992–1994) of the B.P. Konstantinov Petersburg Nuclear Physics Institute (PNPI), member of: the Russian and American Physical Society, the executive committee of the Nuclear Physics Branch of the Russian Academy of Sciences, the editorial board of the Russian journal “Yadernaya Fizika”. Anselm was known for his discovery of non-universality of the Landau pole in Quantum field theory, contributions to the theory of complex angular momenta, works on the Quark model, Spontaneous symmetry breaking, mechanisms of CP violation, modifications of the Standard Model, Cosmology, and the development of a simple model for the proton spin crisis. Biography Anselm was born into a family of physicists. His father (1905–1988) was a Doctor of Physical and Mathematical Sciences, profess ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg
Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland on the Baltic Sea. The city had a population of 5,601,911 residents as of 2021, with more than 6.4 million people living in the Saint Petersburg metropolitan area, metropolitan area. Saint Petersburg is the List of European cities by population within city limits, fourth-most populous city in Europe, the List of cities and towns around the Baltic Sea, most populous city on the Baltic Sea, and the world's List of northernmost items#Cities and settlements, northernmost city of more than 1 million residents. As the former capital of the Russian Empire, and a Ports of the Baltic Sea, historically strategic port, it is governed as a Federal cities of Russia, federal city. The city was founded by Tsar Peter the Great on 27 May 1703 on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Model
The Standard Model of particle physics is the Scientific theory, theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions – excluding gravity) in the universe and classifying all known elementary particles. It was developed in stages throughout the latter half of the 20th century, through the work of many scientists worldwide, with the current formulation being finalized in the mid-1970s upon experimental confirmation of the existence of quarks. Since then, proof of the top quark (1995), the tau neutrino (2000), and the Higgs boson (2012) have added further credence to the Standard Model. In addition, the Standard Model has predicted various properties of weak neutral currents and the W and Z bosons with great accuracy. Although the Standard Model is believed to be theoretically self-consistent and has demonstrated some success in providing experimental predictions, it leaves some physics be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Higgs Phase
In theoretical physics, it is often important to consider gauge theory that admits many physical phenomena and "phases", connected by phase transitions, in which the vacuum may be found. Global symmetries in a gauge theory may be broken by the Higgs mechanism. In more general theories such as those relevant in string theory, there are often many Higgs fields that transform in different representations of the gauge group. If they transform in the adjoint representation or a similar representation, the original gauge symmetry is typically broken to a product of ''U(1)'' factors. Because ''U(1)'' describes electromagnetism including the Coulomb field, the corresponding phase is called a Coulomb phase. If the Higgs fields that induce the spontaneous symmetry breaking transform in other representations, the Higgs mechanism often breaks the gauge group completely and no ''U(1)'' factors are left. In this case, the corresponding vacuum expectation values describe a Higgs phase. Using t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gross–Neveu Model
The Gross–Neveu model (GN) is a quantum field theory model of Dirac fermions interacting via four-fermion interactions in 1 spatial and 1 time dimension. It was introduced in 1974 by David Gross and André Neveu as a toy model for quantum chromodynamics (QCD), the theory of strong interactions. It shares several features of the QCD: GN theory is asymptotically free thus at strong coupling the strength of the interaction gets weaker and the corresponding \beta function of the interaction coupling is negative, the theory has a dynamical mass generation mechanism with \mathbb_2 chiral symmetry breaking, and in the large number of flavor (N \to \infty) limit, GN theory behaves as 't Hooft's large N_c limit in QCD. It is made using a finite, but possibly large number, \ N\ , of Dirac fermion wave functions \psi_1, \psi_2, \ldots, \psi_N, indexed below by Latin letter \ a ~. The model's Lagrangian density is :\mathcal=\bar \psi_a \left( i\ \partial\!\!\!/\ -\ m \right) \p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asymptotic Freedom
In quantum field theory, asymptotic freedom is a property of some gauge theory, gauge theories that causes interactions between particles to become asymptotically weaker as the energy scale increases and the corresponding length scale decreases. (Alternatively, and perhaps contrarily, in applying an S-matrix, asymptotically free refers to free particles states in the distant past or the distant future.) Asymptotic freedom is a feature of quantum chromodynamics (QCD), the quantum field theory of the strong interaction between quarks and gluons, the fundamental constituents of nuclear matter. Quarks interact weakly at high energies, allowing Perturbation theory (quantum mechanics), perturbative calculations. At low energies, the interaction becomes strong, leading to the color confinement, confinement of quarks and gluons within composite hadrons. The asymptotic freedom of QCD was discovered in 1973 by David Gross and Frank Wilczek, and independently by David Politzer in the sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moscow Zero
''Moscow Zero'' is a 2006 film directed by María Lidón. Plot An anthropologist called Sergei goes missing after researching a legend about the existence of demons and an entrance to Hell beneath Moscow. A rescue team led by his friend Owen, an American priest, searches for Sergei in the caves and catacombs beneath the city of Moscow which are inhabited by demon A demon is a malevolent supernatural entity. Historically, belief in demons, or stories about demons, occurs in folklore, mythology, religion, occultism, and literature; these beliefs are reflected in Media (communication), media including f ...s. Cast References External links * * 2006 films American supernatural horror films British supernatural horror films Films scored by Javier Navarrete Films set in Moscow Films shot in Russia Films shot in Spain American independent films Spanish supernatural horror films 2000s Russian-language films British independent films Spanish independent films 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isaak Markovich Khalatnikov
Isaak Markovich Khalatnikov (, ; 17 October 1919 – 9 January 2021) was a leading Soviet theoretical physicist who made significant contributions to many areas of theoretical physics, including general relativity, quantum field theory, as well as the theory of quantum liquids. He is well known for his role in developing the Landau-Khalatnikov theory of superfluidity and the so-called BKL conjecture in the general theory of relativity. Life and career Isaak Khalatnikov was born into a Ukrainian Jewish family in Yekaterinoslav (now Dnipro, Ukraine) and graduated from Dnipropetrovsk State University with a degree in Physics in 1941. He had been a member of the Communist Party since 1944. He earned his doctorate in 1952. His wife Valentina was the daughter of Revolutionary hero Mykola Shchors. Much of Khalatnikov's research was a collaboration with, or inspired by, Lev Landau, including the ''Landau-Khalatnikov theory'' of superfluidity. During 1969 he briefly worked as a pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexei Alexeyevich Abrikosov
Alexei Alexeyevich Abrikosov (; June 25, 1928 – March 29, 2017) was a Soviet, Russian and AmericanAlexei A. AbrikosovAutobiography Nobelprize.org, the official website of the Nobel Prize, 2003 theoretical physicist whose main contributions are in the field of condensed matter physics. He was the co-recipient of the 2003 Nobel Prize in Physics, with Vitaly Ginzburg and Anthony James Leggett, for theories about how matter can behave at extremely low temperatures. Education and early life Abrikosov was born in Moscow, Russian SFSR, Soviet Union, on June 25, 1928, to a couple of physicians: Aleksey Abrikosov and Fani ( Wulf). His mother was Jewish. After graduating from high school in 1943, Abrikosov began studying energy technology. He graduated from Moscow State University in 1948. From 1948 to 1965, he worked at the Institute for Physical Problems of the USSR Academy of Sciences, where he received his Ph.D. in 1951 for the theory of thermal diffusion in plasmas, and then ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gatchina
Gatchina (, ) is a town and the administrative center of Gatchinsky District in Leningrad Oblast, Russia. It lies south-south-west of St. Petersburg, along the E95 highway which links Saint Petersburg and Pskov. Population: It was previously known as ''Khotchino'', ''Gatchina'' (until February 14, 1923), ''Trotsk'' (until August 2, 1929), and ''Krasnogvardeysk'' (until January 28, 1944). Gatchina, the largest town in Leningrad Oblast, is best known as the location of the Great Gatchina Palace, one of the main residences of the Russian Imperial Family during the 18th and 19th centuries. The historic center and Gatchina Palace are part of the UNESCO World Heritage Site's "Historic Centre of Saint Petersburg and Related Groups of Monuments". Another popular tourist attraction in Gatchina is the Prioratsky Palace. Gatchina has placed highly in quality-of-life rankings in Russia. History Early history Gatchina was first documented in 1499 under the na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anselm A A
Anselm may refer to: People Saints * Anselm, Duke of Friuli (s), Benedictine monk and abbot Nonantula * Anselm of Canterbury ( 1033–1109), philosopher, Abbot of Bec, and Archbishop of Canterbury * Anselm of Lucca (1036–1086), better known as Saint Anselm of Lucca Bishops * Anselm I (bishop of Milan) ( 813–818), bishop of Milan * Anselm II (archbishop of Milan) (died 896), also known as Anselm II Capra * Anselm I of Aosta (994–1026), the last bishop to serve as count of Aosta, and brother-in-law of Burchard, bishop of Aosta * Anselm I of Lucca (died 1073), better known as Pope Alexander II * Anselm II (1070s 1090s), bishop of Aosta * Anselm III (archbishop of Milan) (; 1086–1093) * Anselm IV (archbishop of Milan) (; 1097–1101) * Anselm of Havelberg (–1158), Premonstratensian canon and archbishop of Ravenna * Anselm V (Archbishop of Milan) ( 1126–1136), also known as Anselmo della Pusterla * Anselm of Meissen (13th century), bisho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vladimir Gribov
Vladimir Naumovich Gribov (Russian Влади́мир Нау́мович Гри́бов; March 25, 1930August 13, 1997) was a prominent Russian theoretical physicist, who worked on high-energy physics, quantum field theory and the Regge theory of the strong interactions. His best known contributions are the pomeron, the DGLAP equations, and the Gribov copies. Life Gribov was born in Leningrad in 1930. His father died in 1938 as a result of disease. His mother, a theater worker, not an actress, brought him up alone with his younger sister. In 1941 the family was evacuated deep into the USSR and returned in 1945. In 1947, he finished school and dreamed of becoming an actor, particularly a cinema actor. He had to accept, however, his awkwardness in such things and so chose another direction: physics. In 1947, Gribov enrolled in the Physical Faculty of Leningrad University, graduating in 1952 with diploma cum laude. Despite his ability, the official antisemitism of the time mean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiconductor
A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping levels are present in the same crystal, they form a semiconductor junction. The behavior of charge carriers, which include electrons, ions, and electron holes, at these junctions is the basis of diodes, transistors, and most modern electronics. Some examples of semiconductors are silicon, germanium, gallium arsenide, and elements near the so-called " metalloid staircase" on the periodic table. After silicon, gallium arsenide is the second-most common semiconductor and is used in laser diodes, solar cells, microwave-frequency integrated circuits, and others. Silicon is a critical element for fabricating most electronic circuits. Semiconductor devices can display a range of different useful properties, such as passing current more easil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
