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Brane - Wikipedia, the free encyclopedia Branes are objects in M-theory and its offshoot, brane cosmology. In brane cosmology, the term "brane" is used to refer to objects similar to our four-dimensional universe, which move in a higher-dimensional "bulk". In M-theory, p-branes (the name is derived from membrane) are objects of spatial dimensionality p (for example, a string is a 1-brane and a flat surface is a 2-brane). en.wikipedia.org /wiki/Brane   (88 words)

Brane Theory But even if brane worlds aren’t real, Carroll said, “they will have taught us a useful lesson that we should have known all along, which is that we don’t have a clue to what’s going on.” Polchinski, for one, believes that branes are probably real, even though he isn’t sure where the idea will lead. Brane worlds (like the one we might live in) must by necessity be “3 plus 1” branes — three dimensions of space plus one of time. Essentially, a brane is a discontinuity in space-time, a boundary where things meet, like the surface of a pond where the water meets the sky. www.theosophysandiego.org /Featured/branethe.htm   (2393 words)

Stretching your brane Branes reside in the hidden dimensions, known as ``the bulk.'' While matter and light stick to the branes, gravity traverses both branes and bulk. Many brane scenarios, the Michigan physicists found, are inconsistent with current estimates of the age of the universe and measurements of the amounts of various chemical elements created in the big bang. Furthermore, it's hard to reconcile certain brane approaches with a constant strength of gravity in the universe today, Dr. Freese said in an e-mail interview. fnth37.fnal.gov /lykken/dallas.html   (2043 words)

Brane - Interview with Lisa Randall, Ph.D. So gravity is concentrated on one brane, the Planck brane, and we live on a second brane, not precisely on top of the first brane but a little apart. We generally assume that we live on a brane, but it may not be the brane on which gravity is concentrated. Another is that we live on a second brane, which is the case where we discussed the hierarchy problem. www.esi-topics.com /brane/interviews/DrLisaRandall.html   (1887 words)

Branes Many brane scenarios are inconsistent with current estimates of the age of the universe and measurements of the amounts of various chemical elements created in the big bang. The motion of branes in space-time may be described by the simple dynamics of the gauge theories which arise on their space-time world volumes. Branes are defined by the number of dimensions. www.kheper.net /cosmos/quantum_physics/branes.html   (848 words)

0102042 At the horizon $V=V_H$ and hence the entropy density on the brane is $s=1/4\mathbf{G}_N$. In this description the movement of the brane turns out to be exactly described by the standard Friedmann equation in which the size of the universe directly corresponds to the distance of the brane to the center of the black hole. The entropy density and temperature of the CFT at the moment that the brane crosses the horizon are calculated in section~4. www.vic.com /siopsis/papers/01/0102042   (3914 words)

Edge: THEORIES OF THE BRANE The aforementioned second brane appeared to serve two purposes: It explained the hierarchy problem because of the small probability for the graviton to be there, and it was also responsible for bounding the extra dimension so that at long distances (bigger than the dimension's size) only three dimensions are seen. Branes allow for an entirely new set of possibilities in the physics of extra dimensions, because particles confined to the brane would look more or less as they would in a three-plus-one-dimension world; they never venture beyond it. Branes don't even all have to be three-plus-one-dimensional; maybe there are other dimensions of branes in addition to those that look like ours and are parallel to ours. www.edge.org /3rd_culture/randall03/randall03_print.html   (4175 words)

When Branes Collide: Science News Online, Sept. 22, 2001 That "brane" (blue at left) is known as a boundary brane because it lies at one boundary of the fifth dimension. Moreover, Linde claims that the branes in the ekpyrotic model are not truly uniform in structure and therefore can't account for the large-scale uniformity of the universe. Many physicists are studying branes in the hope of linking gravity and the other fundamental forces of nature to the elementary particles that communicate these forces. www.sciencenews.org /articles/20010922/bob9.asp   (2614 words)

In String Theory, What Is A Brane? - Bad Astronomy and Universe Today Forum Branes are a generalization of strings in M-Theory, which is the superset of the different string theories. In the still rather hypothetical brane cosmology the universe is a 3-brane and everything in it is open ended strings that are stuck to it. I'm not sure if this means that the universe comes into existence at different area's of the brane, or if the collisions each produce their own universe. www.bautforum.com /showthread.php?p=346304#post346304   (1196 words)

Is there a more fundamental theory? D branes are important in understanding black holes in string theory, especially in counting the quantum states that lead to black hole entropy, which was a very big accomplishment for string theory. Roughly speaking, a D brane is a p-brane where the ends of open strings are localized on the brane. In terms of branes, what we usually call a membrane would be a two-brane, a string is called a one-brane and a point is called a zero-brane. superstringtheory.com /basics/basic7.html   (677 words)

The search for extra dimensions (November 2000) - Physics World - PhysicsWeb String-theory p-branes are good candidates for brane worlds because they possess gauge symmetries on their "surfaces" and automatically incorporate a quantum theory of gravity, namely string theory. The electromagnetic, weak and strong forces, trapped within the 3-D brane, are not aware of the extra dimension and so maintain their usual behaviour. This 3-D surface is known as a "brane", a name derived from membrane, the 2-D equivalent. physicsweb.org /article/world/13/11/9   (2821 words)

Brane-Cantenac wines at Berry Bros & Rudd Brane Cantenac was perceived throughout much of the 70s and 80s as an underperforming property. The impressive and haunting façade of Château Brane- Cantenac lies west of the village of Cantenac in the Margaux appelation. Consequently, the wines at Brane Cantenac now show more weight and concentration, although they still possess that haunting bouquet and quintessential elegance that characterise the wines of Margaux. www.bbr.com /US/db/producer/3511?first_product_F=1&ID=null   (622 words)

D-brane Intriguingly, there are just as many massless scalars as there are directions perpendicular to the brane; the geometry of the brane arrangement is closely related to the quantum field theory of the particles "living" on it. In fact, these massless scalars are Goldstone excitations of the brane, corresponding to the different ways the symmetry of empty space can be broken. If we regard two overlapping branes as distinct objects, then we still have all the sectors we had before, but without the effects due to the brane separations. www.worldhistory.com /wiki/D/D-brane.htm   (1597 words)

Luboš Motl's reference frame: Types and meaning of the branes Moreover, we require that the brane does not destroy any rotational symmetries between the dimensions transverse to the brane, and it also preserves the translational and Lorentz symmetries involving the dimensions along the brane worldvolume which is the subspace of spacetime spanned by time as well as the spatial dimensions of the brane. The last condition implies that a sheet of paper is not quite a brane because the Lorentz symmetry is spontaneously broken by the sheet of paper: there is a preferred reference frame associated with the atoms of paper. The word "brane", created by removing "mem" from a "membrane", is a generalization of a "membrane" that can have an arbitrary number of spatial dimensions. motls.blogspot.com /2005/01/types-and-meaning-of-branes.html   (3825 words)

Brane Space LLC BRANE is a powerful web-based Team Collaboration Application for workgroup project management designed for your Microsoft Windows Server. BRANE brings a new dimension in supporting team collaboration and rigorous project workgroups in a single, yet flexible, environment. BRANE Work Space is where the collaboration and work take place! www.branespace.com   (254 words)

Chateau Brane-Cantenac In 1833 it was purchased by "Baron de Brane", the famed viticulturalist often referred to as "The Napoleon of Wines" who had sold his estate of Chateau Mouton- Rothschild to finance his acquisition. Chateau Brane Cantenac lies west of the village of Cantenac, relatively inland from the Gironde Esuary on what is known as the "Le Plateau de Brane". Approximately 30,000 cases are produced, with Second label "Le Baron de Brane", Chateau Notton and Domaine de Fontarney. www.wine-journal.com /branecantenac.html   (1117 words)

Brane World Cosmology Comes Down to Earth In two dimensions the brane is a sheet, or membrane ("M-brane") and in three dimensions a real world just like ours. But this hyperspace knot unraveled in the 1990s: theorists proposed that higher-dimensional extended objects, known as branes, could be embedded in spaces including five or six large dimensions. Coauthor Misao Sasaki (Osaka University) had this comment for Science Watch: "We’ve derived the gravitational equations as seen by an observer on the brane. www.sciencewatch.com /july-aug2002/sw_july-aug2002_page6.htm   (918 words)

Two-Brane Universe - Physics Help and Math Help - Physics Forums A one-brane is a string, a two-brane is a membrane, a three-brane has three extended dimensions, etc. More generally, a p-brane has p spatial dimensions. But when this brane interacts with another brane, the 3 spatial structures are transformed into a spacetime structure. The time direction of each brane is the exact "opposite" of the other. www.physicsforums.com /showthread.php?threadid=15231   (1203 words)

Brane world gravity The meeting gave an overview of the state of the art in brane world gravity, in a form accessible to non-experts and the many graduate students present. A half-day meeting entitled ``Brane-world gravity" was held at Imperial College London on 13th November 2002, under the auspices of the Gravitational Physics Group of the Institute of Physics. John March-Russell began with an overview of the physics of brane worlds, including the latest experimental constraints, from colliders, astrophysics and cosmology. www.phys.lsu.edu /mog/mog21/node13.html   (270 words)

M Theory Visionists - The Importance of Tipping Light Cones Using the brane scenrios helps to enlighten the relevance of how and what is held to the brane. A variant known as membrane theory (M-theory, "branes" -- multi-dimensional membranes) puts gravity in an eleventh dimension and points to an infinite number of solutions -- implying (for some) an infinite number of universes. The uncertainty relations from quantum mechanics, when interpreted as a physical axiom, prohibit any local and realistic interpretation, because their immediate consequence is a spreading of wave packets that rather runs against the whole construction of a conventional approach based upon relativity. wc0.worldcrossing.com /WebX?14@142.dGgUbo7NA8W.21@.1dde934e/98   (1389 words)

Brane World versus Kaluza-Klein Things are very different in the brane world scenario as we can see for the case of the type I string. It is important to realise the difference between the brane world and the better known Kaluza-Klein scenario. In Kaluza-Klein all fields feel the extra dimensions whereas in the brane world, only a subset of the fields (gravity and moduli fields in string theory) feel all the extra dimensions. fisica.usac.edu.gt /public/curccaf_proc/quevedo1/node17.html   (712 words)

Budding Black Holes If the brane were a flat, stretchy sheet, a black hole could emit a graviton perpendicular to the sheet, and the black hole's recoil could distort the nearby brane region, creating a deep dimple. This "brane bubble" could then pinch off from ours and break free, forming a so-called baby brane that is separate from and invisible to our own. To simulate the brane's warping, Flachi and Tanaka used a computer to crunch through general relativity equations. focus.aps.org /story/v16/st12   (662 words)

Brane World Cosmological Constant in the (ResearchIndex) The brane curves the bulk space-time in a small region around it. We nd exact solutions of higherdimensional Einstein equations with single at Minkowsky brane of arbitrary large tension (or brane cosmological constant) and compact extra dimensions. Abstract: We consider \brane universe" with nonzero tension in the models with large extra dimensions. citeseer.ist.psu.edu /637421.html   (249 words)

Matrix String Theory from Brane Configuration (ResearchIndex) This opens up an avenue for the investigation of matrix string dynamics via the geometry of brane configurations in type IIA string theory. Abstract: Configurations of fivebranes, twobranes and fourbranes in type IIA string theory, which give (1+1) dimensional supersymmetric gauge theories in the low energy limit, are constructed. It is shown that these brane configurations are equivalent to a certain class of matrix string theories. citeseer.ist.psu.edu /130582.html   (335 words)

Brane (Entrance Grave) The Modern Antiquarian Brane (Entrance Grave) This small entrance grave is situated on low lying ground near the hamlet of Brane, to the south of Carn Euny. Brane (Entrance Grave) on The Modern Antiquarian, the UK and Ireland's most popular megalithic community website. With the help of Mike Rosendale of Penwith District Council and the co-operation of the owners, the Wherrys of Brane, a plan to repair the entrance grave was devised. www.themodernantiquarian.com /site/230   (991 words)

Brane Mozetič Brane Mozetič is a poet, writer, translator and editor who graduated in comparative literature from the University of Ljubljana. He also pursued an advanced degree in comparative literature in Paris. slovenia.poetryinternational.org /cwolk/view/22680   (217 words)

Looking for extra dimensions Light is made of electromagnetic radiation, and in a braneworld model, the charges and the fields should propagate only on the brane. There are still Kaluza-Klein modes of oscillation in the extra dimensions, but because they couple through gravity, and gravity is mostly confined to the brane, they are effectively invisible to our world on the brane. But some braneworld models need supersymmetry for the brane geometry to be stable. superstringtheory.com /experm/exper51.html   (989 words)

Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations We also examine the causality of the Goedel brane and show that the presence of the bulk cannot prevent the appearance of closed time-like curves. We show how the anisotropy of the Goedel-type brane is dictated by that of the bulk and find that the converse is also true. This determines the precise evolution of the nonlocal anisotropic stresses, without any phenomenological assumptions, and leads to a self-consistent closed set of equations for the evolution of the Goedel brane. www.osti.gov /energycitations/product.biblio.jsp?osti_id=20551222   (261 words)

Cosmology ... The creation of MASS. The basic 'difference' to all previous scientific approaches is that the Brane (and following sub-branes) is unbreakable. When we start from a MAMA-Brane which is unbreakable, and super-elastic (but has it's limits in stretchability) then the Mama-Brane can create strings, which are thus parts of the brane. The creation of a string can start on two levels: (1) starting via an outer bending of the Mama-Brane, or (2) starting via an inner bending of the Mama-Brane. www.mu6.com   (698 words)

Brane Kisic Emerald Passport Director, CEO and Founder of FormulaToRiches.info Announces his New Creation - FormulaToRiches.info Website Brane Kisic Emerald Passport Director will equip, train, groom and direct you not only to be a millionaire on the outside but also to be a millionaire on the inside,too. For more information’s on Brane Kisic Emerald Passport Director,Emerald Passport Inc and Emerald Passport Product suite go to web site www.FormulaToRiches.info. Brane Kisic Emerald Passport Director, CEO and Founder of FormulaToRiches.info Announces his New Creation - FormulaToRiches.info Website www.emediawire.com /releases/2005/3/emw215596.htm   (1164 words)

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