D-branas
WebCunningham RM, Carter PM , Ranney ML, Walton M , Zeoli AM, Alpern ER, Branas C, Beidas RS, Ehrlich PF, Goyal MK, Goldstick JE, Hemenway D, Hargarten SW, King CA, …
D-branas
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In string theory, D-branes, short for Dirichlet membrane, are a class of extended objects upon which open strings can end with Dirichlet boundary conditions, after which they are named. D-branes were discovered by Jin Dai, Leigh, and Polchinski, and independently by Hořava, in 1989. In 1995, … See more The equations of motion of string theory require that the endpoints of an open string (a string with endpoints) satisfy one of two types of boundary conditions: The Neumann boundary condition, corresponding to … See more When two D-branes approach each other the interaction is captured by the one loop annulus amplitude of strings between the two branes. The scenario of two parallel branes … See more Another important use of D-branes has been in the study of black holes. Since the 1970s, scientists have debated the problem of black holes having entropy. Consider, as a thought experiment, dropping an amount of hot gas into a black hole. Since the gas … See more • Bogomol'nyi–Prasad–Sommerfield bound • M-theory See more This has implications for physical cosmology. Because string theory implies that the Universe has more dimensions than we expect—26 for bosonic string theories and … See more The arrangement of D-branes constricts the types of string states which can exist in a system. For example, if we have two parallel D2-branes, we can easily imagine strings stretching from brane 1 to brane 2 or vice versa. (In most theories, strings are oriented objects: … See more Dirichlet boundary conditions and D-branes had a long "pre-history" before their full significance was recognized. A series of 1975-76 papers by Bardeen, Bars, Hanson and Peccei dealt with an early concrete proposal of interacting particles at the … See more WebOUR HISTORY. DF Barnes first opened its doors in 1932 as a manufacturer of marine engines and steel-hulled vessels. Today, we provide specialized maintenance, …
http://whystringtheory.com/toolbox/d-branes/ WebNational Center for Biotechnology Information
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WebD-branes allow physicists to do calculations that transcend the approximate methods of perturbation theory. Thus we can uncover elements of the theory in regimes where …
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