Theoretical physics Theoretical physics In theoretical physics, an Alice universe is a hypothetical universe with no global definition of charge. What a Klein bottle is to a closed two-dimensional surface, an Alice universe is to a closed three-dimensional volume. The name is a reference to the character in Lewis Carroll's children's book, Alice Through the Looking-Glass. ...more on Wikipedia about "Alice universe"
(Analysis of flows) To be expanded ...more on Wikipedia about "Analysis of flows"
Analytical mechanics is a term used for a refined, highly mathematical form of classical mechanics, constructed from the eighteenth century onwards as a formulation of the subject as founded by Isaac Newton. ...more on Wikipedia about "Analytical mechanics"
In theoretical physics, the antibracket algebra is used in the Batalin-Vilkovisky formalism. A is an antibracket algebra if there are two bilinear products on it, . and ((,)) such that it is a Z×Z2 graded associative algebra under . and satisfies the following: ...more on Wikipedia about "Antibracket algebra"
Background independence is a condition in theoretical physics, especially in quantum gravity, that requires the defining equations of a theory to be independent of the actual shape of the spacetime and the value of various fields within the spacetime. The different configurations (or backgrounds) should be obtained as different solutions of the underlying equations. ...more on Wikipedia about "Background independence"
(Bernard d'Espagnat) Theoretical Physicist and author (b. Fourmagnac, France, 1921) best know for his work on the nature of reality. ...more on Wikipedia about "Bernard d'Espagnat"
A Bethe lattice or Cayley tree is a connected cycle-free graph where each node is connected to z neighbours, where z is called the coordination number. It can be seen as a tree-like structure emanating from a central node, with all the nodes arranged in shells around the central one. The central node may be called the root or origin of the lattice. The number of nodes in the k'th shell is given by ...more on Wikipedia about "Bethe lattice"
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The Bogdanov Affair is a controversy regarding the merit of a series of theoretical physics papers written by French twin brothers Igor and Grichka Bogdanov (or Bogdanoff). These papers were published in reputable scientific journals, and culminate in a proposed theory for describing what occurred before the Big Bang. The controversy started in 2002 when accusations were made on Usenet newsgroups that the work was a deliberate hoax targeting the physics community. While the Bogdanovs defend the veracity of their work, some physicists have alleged that the papers are nonsense, and have raised questions about the strength of the peer-review system that selected the research for publication. ...more on Wikipedia about "Bogdanov Affair"
Branes are objects in M-theory and its offshoot, brane cosmology. ...more on Wikipedia about "Brane"
C*-algebras are an important area of research in functional analysis, a branch of mathematics. A C*-algebra can be defined concretely as a complex algebra A of linear operators on a complex Hilbert space with two additional properties: ...more on Wikipedia about "C*-algebra"
CHNC is used as the acronym for a method in many-body theoretical physics known as the Classical-map Hyper-Netted-Chain technique. It has been applied to interacting uniform electron liquids in two and three dimensions, and to interacting hydrogen plasmas. ...more on Wikipedia about "CHNC"
A classical field theory is a physical theory that describes the study of how one or more physical fields interact with matter. ...more on Wikipedia about "Classical field theory"
In recent years, there has been renewed interest in covariant classical field theory. Here, dynamics are phrased in the context of a finite-dimensional space of fields at a given event in spacetime. Nowadays, it is well known that jet bundles are the correct domain for such a description. ...more on Wikipedia about "Covariant classical field theory"
The density matrix renormalization group (DMRG) is a numerical technique originally intended to obtain the ground state of a quantum manybody system with high accuracy. It is a variational method, and its efficiency does not decrease when the system is strongly correlated. The method has been extended to equilibrium statistical mechanics and non-equilibrium systems. Its main disadvantage is that only 1D and tree-like systems are suitable to obtain the maximum power of the method. ...more on Wikipedia about "Density matrix renormalization group" http://www.shortopedia.com, it's as simple as that! Theoretical_physics
In theoretical physics, digital physics holds the basic premise that the entire history of our universe is computable, that is, the output of a (presumably short) computer program. The hypothesis was pioneered in Konrad Zuse's book Rechnender Raum (translated by MIT into English as Calculating Space, 1970). Its proponents include Edward Fredkin , Juergen Schmidhuber, Stephen Wolfram, and Nobel laureate Gerard 't Hooft . They hold that the apparently probabilistic nature of quantum physics is not incompatible with the notion of computability. A quantum version of digital physics has recently been proposed by Seth Lloyd . ...more on Wikipedia about "Digital physics"
In theoretical physics, a discrete symmetry is a symmetry under the transformations of a discrete group - i.e. a topological group with a discrete topology whose elements form a finite or a countable set. ...more on Wikipedia about "Discrete symmetry"
In physics, the Eightfold Way is a term coined by American physicist Murray Gell-Mann for a theory organizing subatomic baryons and mesons into octets (alluding to the Noble Eightfold Path of Buddhism). The theory was independently proposed by Israeli physicist Yuval Ne'eman and led to the subsequent development of the quark model. ...more on Wikipedia about "Eightfold way (physics)"
In physics, a field is an assignment of a physical quantity to every point in space (or, more generally, spacetime). A field is thus viewed as extending throughout a large region of space so that it's influence is all-pervading. The strength of a field usually varies over a region. ...more on Wikipedia about "Field (physics)"
(Field equation) * Carl Murray, Is the Solar System stable?, http://www.fortunecity.com/emachines/e11/86/solarsys.html ...more on Wikipedia about "Field equation"
In theoretical physics, fine-tuning refers to circumstances when the parameters of a model must be adjusted very precisely in order to agree with observations. Theories requiring fine-tuning are regarded as problematic in the absence of a known mechanism to explain why the parameters happen to have precisely the needed values. Explanations often invoked to resolve fine-tuning problems include natural mechanisms by which the values of the parameters may be constrained to their observed values, the anthropic principle, and intelligent design. ...more on Wikipedia about "Fine-tuning"
This can be done globally, using a partition of unity. Then, we say we have an irreducible first-class constraint (irreducible here is in a different sense from that used in representation theory). ...more on Wikipedia about "First class constraint"
In theoretical physics, G parity is a multiplicative quantum number that results from the generalization of C parity to multiplets of particles. ...more on Wikipedia about "G parity"
The Galilean transformation is used to transform between the coordinates of two coordinate systems in a constant relative motion in Newtonian physics. This is the passive transformation point of view. The equations below, although apparently obvious, break down at speeds that approach the speed of light. ...more on Wikipedia about "Galilean transformation"
In theoretical physics, geometrodynamics generally denotes a program of reformulation and unification which was enthusiastically promoted by John Archibald Wheeler in the 1960s. ...more on Wikipedia about "Geometrodynamics"
Green-Kubo relations give exact mathematical expression for transport coefficients in terms of integrals of time correlation functions. ...more on Wikipedia about "Green-Kubo relations"
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