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Topic: Type IIA string theory

Related Topics

Type II string

Superstring theory

List of string theory topics

Open string

String theory

Closed string

Dilaton

Moduli

General relativity

Brane cosmology

Moduli space

Quantum mechanics

Physics

Cosmological constant

Planck length

	M-theory - Wikipedia, the free encyclopedia
		It was shown in the early 1990s that the various superstring theories were related by dualities, which allowed physicists to relate the description of an object in one string theory to the description of a different object in another theory.
		The Type IIA string theory and the Type IIB string theory are connected by T-duality; this means, essentially, that the IIA string theory description of a circle of radius R is exactly the same as the IIB description of a circle of radius 1/R. This is a profound result.
		String theorists have found strong evidence that the two theories are really the same, even away from the extremely strong and extremely weak limits, but they do not yet have a proof strong enough to satisfy mathematicians.
	en.wikipedia.org /wiki/M-theory (1574 words)

	Type II string theory - Wikipedia, the free encyclopedia
		In theoretical physics, type II string theory is a unified term that includes both type IIA strings and type IIB strings.
		At low energies, type IIA string theory is described by type IIA supergravity in ten dimensions which is a non-chiral theory (i.e.
		At low energies, type IIB string theory is described by type IIB supergravity in ten dimensions which is a chiral theory (left-right asymmetric) with (2,0) d=10 supersymmetry; the fact that the anomalies in this theory cancel is therefore nontrivial.
	en.wikipedia.org /wiki/Type_II_string (277 words)

	String field theory - Wikipedia, the free encyclopedia
		String field theory is a proposal to define string theory in such a way that the background independence is respected.
		String field theory can be understood as a quantum field theory with infinitely many fields which are unified into one master "string field".
		String field theory did not turn out to be helpful in the second superstring revolution because this revolution has revealed that other objects such as branes are as fundamental as the strings themselves.
	en.wikipedia.org /wiki/String_field_theory (267 words)

	String theory - Wikipedia, the free encyclopedia
		String theory is a model of fundamental physics whose building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that are the basis of the Standard Model of particle physics.
		String theories which include fermionic vibrations are now known as superstring theories; several different kinds have been described.
		Since string theory may not be tested in the foreseeable future, some scientists have asked if it even deserves to be called a scientific theory: it is not yet a falsifiable theory in the sense of Popper.
	en.wikipedia.org /wiki/String_theory (2670 words)

	M-theory - Simple English Wikipedia
		String theory says that this is wrong and that the simplest objects in the universe are shaped like pieces of string.
		Albert Einstein's theory that describes the universe on very large scales (it is called general relativity), disagrees with two theories that describe things on very small scales (they are called quantum mechanics and the standard model).
		String theory includes particles that cause gravity, called gravitons; finding this out delighted the scientists who work on string theory.
	simple.wikipedia.org /wiki/M-theory (918 words)

	Encyclopedia: Superstring theory (Site not responding. Last check: 2007-10-22)
		Superstring theory is a shorthand for "supersymmetric string theory" because unlike bosonic string theory, it is the version of string theory that incorporates fermions and supersymmetry.
		Gabriele Veneziano is a theoretical physicist and one of the founders of string theory.
		This theory is special in the sense that it is based on unoriented open and closed strings, while the rest are based on oriented closed strings.
	www.nationmaster.com /encyclopedia/Superstring-theory (4147 words)

	M-theory (simplified) - Encyclopedia, History, Geography and Biography
		Instead, string theory posits that the Universe is fundamentally composed of 1-dimensional objects—things that are similar to a string.
		In string theory, each fundamental particle is created in some sense by different patterns of vibration of the strings.
		Since string theory claims to be a theory of everything, there should really only be one consistent formulation of the theory, but instead there are 5.
	www.arikah.net /encyclopedia/M-theory_%28simplified_explanation%29 (1153 words)

	String
		String Cheese Incident The String Cheese Incident, one of the forefront bands of the bass guitar; born 5 February 1965)...
		String field theory String field theory is a proposal to define quantum field theory with infinitely many fields which a...
		String quartet A string quartet is a string musical instruments or a piece written to be performed by such a group.
	www.brainyencyclopedia.com /topics/string.html (1209 words)

	Type II string -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-22)
		Both theories have the maximal amount of ((physics) a theory that tries to link the four fundamental forces) supersymmetry — namely 32 (additional info and facts about supercharge) supercharges — in ten dimensions.
		At low energies, type IIA string theory is described by type IIA (additional info and facts about supergravity) supergravity in ten dimensions which is a non- (additional info and facts about chiral) chiral theory (i.e.
		In the 1990s it was realized that type II string theory with the string coupling constant is equivalent to the same theory with the coupling.
	www.absoluteastronomy.com /encyclopedia/t/ty/type_ii_string1.htm (295 words)

	Luboš Motl's reference frame: String equations are approximate
		In the case of the heterotic-E and type IIA string theories, you obtain an eleven-dimensional theory whose physics is known at low energies perturbatively - it is known to be eleven-dimensional supergravity.
		String theory can be defined as the conglomerate of all good ideas in theoretical physics, and they are merged with one another into one big structure.
		String theory is clearly a structure where these good ideas are connected physically in ways that offer highly non-trivial consistency checks - the ideas are incorporated in such a way that hundreds of potential disasters - those that would ruin other theories that are not "quite" string theory - always miraculously disappear.
	motls.blogspot.com /2004/10/string-equations-are-approximate.html (1872 words)

	Beyond string theory introduction
		The two heterotic string theories and the two type II theories are linked by T-duality, in a way very similar to the one described in the section on duality.
		Thus, all string theories are linked -- the question of which string theory is realized in nature and the embarassment of choice is partly lifted, since all five string theories turn out to be linked by various dualities.
		It has to be a theory that lives in eleven dimensions, which partly explains why we don't know it; none of the string theories we encountered thus far lives in eleven dimensions.
	www.geocities.com /beyondstringtheory/mtheory.html (460 words)

	Exploring Other Dimensions: The String Theory (Site not responding. Last check: 2007-10-22)
		Types HO and HE both have 10 dimensions, supersymmetry, closed strings, and are heterotic (meaning right- and left-moving strings differ), but they have different group symmetries.
		The M Theory, or Mother Theory, would take all of these string theories, which are all very viable, and combine them to form the basic theory of existence.
		In conclusion, the differing string theories are intriguing examples of theoretical physics, but have yet to be proved and tested.
	home.comcast.net /~hellokevin/dimensions/stringtheory.html (308 words)

	type IIA string theory Comparison Table (Site not responding. Last check: 2007-10-22)
		A proposal for the ultimate laws of nature, a "theory of everything," stemming primarily from discoveries in the mid 1980's.
		The fundamental entity in this theory is an ultramicroscopic string-like object, with a length of typically 10
		The simplest predictions of superstring theory concern processes at the Planck energy, and so far very little is known about the consequences of string theory at lower energies.
	www.csi.uottawa.ca:4321 /astronomy/typeIIAstringtheory_table.html (142 words)

	Type IIA string - TheBestLinks.com - Type IIA string theory, M-theory, String theory, TheBestLinks.com:Find or fix a ... (Site not responding. Last check: 2007-10-22)
		Type IIA string theory, Type IIA string, M-theory, String theory...
		In theoretical physics, type IIA string theory is one of five consistent supersymmetric string theories in ten dimensions.
		At low energies, type IIA string theory is described by type IIA supergravity in ten dimensions which is a non-chiral (left-right symmetric) theory with (1,1) d=10 supersymmetry; the fact that the anomalies in this theory cancel is therefore trivial.
	www.thebestlinks.com /Type_IIA_string_theory.html (205 words)

	week72
		However, the string-string duality conjecture in six dimensions states that the strongly coupled limit of a Heterotic string theory in six dimensions on a four-torus is equivalent to a weakly coupled Type II string theory in six-dimensions on K3.
		Similarly, it states that the strongly coupled limit of a Type II theory in six dimensions on K3 is equivalent to a weakly coupled Heterotic string theory in six-dimensions on a four-torus.
		Now, as a strongly coupled Type IIA string theory in ten-dimensions is equivalent to the low energy limit of M-Theory on a "large" S^1, the low energy limit of M-Theory on S^1 x K3 should be equivalent to a weakly coupled Heterotic string theory on a four-torus by way of six-dimensional string-string duality.
	math.ucr.edu /home/baez/week72.html (1916 words)

	CERN Courier - Superstrings, black holes and gauge theories (page 2) - IOP Publishing - article
		This puts the five string theories in a unified framework they are equivalent descriptions of the same physical system with different variables.
		Figure 2 describes the parameter space of string theories the edges are points where the corresponding string is weakly coupled.
		Just as theories of three spatial dimensions and one of time became four-dimensional space-time theories, we may be led to add the energy scale and have five natural co-ordinates.
	www.cerncourier.com /main/article/39/3/11/2 (1150 words)

	twisted K-theory and strings
		String theory is arguably the most exciting research area in modern mathematical physics.
		It arises as the T-dual of open strings on a circle bundle, where the open strings in the dual theory are no longer free to move everywhere in space, but are endowed with Dirichlet boundary conditions so that the endpoints are free to move only on a submanifold known as a D-brane.
		I was an invited speaker at the "String Theory Conference 2002" in Hangzhou, China August 12-15, 2002 and in Beijing, China August 17-19, 2002.
	www.maths.adelaide.edu.au /people/vmathai/dbrane.html (1132 words)

	M-Theory
		It is known that Type IIA theory can be obtained from the dimensional reduction of the eleven dimensional supergravity theory (a theory known from the 70's years) and given by the Cremmer-Julia-Scherk Lagrangian
		The ten-dimensional IIA supergravity describing the bosonic part of the low energy limit of the Type IIA superstring theory is
		It is conjectured that there exist an eleven dimensional fundamental theory whose low energy limit is the 11 dimensional supergravity theory and that it is the strong coupling limit of the Type IIA superstring theory.
	fisica.usac.edu.gt /public/hugo/courseguate/node13.html (278 words)

	List Of Articles (Site not responding. Last check: 2007-10-22)
		The effective action for the low energy scattering of two gravitons with a D-brane in the presence of a constant antisytmetric $B$ field in bosonic string theory is calculated and the modification to the standard D-brane action to first order in $\alpha'$ is obtained.
		It is shown that whereas the quantum corrections to N=1 sector of the theory are not affected by the C-deformation, the non(anti)commutativity parameter C receives one-loop perturbative corrections.
		The inflationary brane is either a D3- or a D5-brane of type IIB string theory.
	theory.ipm.ac.ir /papers/ahmad.html (406 words)

	[No title]
		In this paper, Witten argues that the strong coupling limit of type IIA string theory is something that has, as its low energy limit, 11D supergravity.
		The size of the 11th dimension is related to the string coupling constant (equivalently, the dilaton).
		Anyways, string theory being the absurdly fast-moving field that it is, all the current rage is noncommutative geometry.
	www.math.niu.edu /~rusin/known-math/00_incoming/strings (746 words)

	Matrix String Theory from Brane Configuration (ResearchIndex)
		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.
		0.4: Chiral Symmetry from Type IIA Branes - Amihay Hanany
	citeseer.ist.psu.edu /130582.html (335 words)

	Luboš Motl's reference frame: Matrix Big Bang
		On the other hand, string theory has so far been unsuccessful to resolve other singularities such as the spacelike singularities near the Big bang and in the middle of the fl hole.
		Also, the spectrum of this theory is isomorphic to the spectrum of the trivial theory with constant dilaton.
		Sav also recalled how one obtains matrix string theory - the baby of mine and DVV - by compactifying one more circle in the eleven-dimensional spacetime, thereby producing a matrix model for type IIA string theory which happens to be a maximally supersymmetric Yang-Mills theory in 1+1 dimensions compactified on a spatial circle.
	motls.blogspot.com /2005/05/matrix-big-bang.html (1059 words)

	Theories of Everything
		Until recently, the best hope for a theory that would unite gravity with quantum mechanics and describe all physical phenomena was based on strings: one-dimensional objects whose modes of vibration represent the elementary particles.
		Five competing theories held sway, designated by their mathematical characteristics as the E8 x E8 heterotic, the SO(32) heterotic, the SO(32) Type 1, the Type IIA and Type IIB strings.
		A p-brane of dimension 0 is a particle, that of dimension 1 is a string and that of dimension 2 is a sheet or bubble.
	www.dhushara.com /book/quantcos/fs/fstr.htm (4213 words)

	S01 Abstracts (Site not responding. Last check: 2007-10-22)
		We consider the 3+1 visible sector to live on a Hanany-Witten D-brane construction in type IIA string theory.
		In the open string channel supersymmetry is broken by gauge mediation while in the closed string channel supersymmetry is broken by gravity mediation.
		theory, and the boundary excitations of the noncommutative theory in
	hep.ucsd.edu /seminars/details_s01.htm (387 words)

	Talk 2618 data/Fall_1997/1103 (Site not responding. Last check: 2007-10-22)
		We construct two dimensional gauge theories with N=(4,4) supersymmetry from branes of type IIA string theory.
		Quantum effects in the two dimensional gauge theory are analyzed by embedding the IIA brane construction into M-theory.
		A relationship to the decoupling limit of the type IIA and IIB 5-branes in Matrix theory is shown.
	www.math.duke.edu /mcal?abstract-2618 (136 words)

	Citations: hep-th - Banks, Fischler, Shenker, Susskind, Rev (ResearchIndex)
		the quantum mechanics of N D particles [2] of type IIA string theory in the large N limit describes the eleven dimensional dynamics of M theory [3, 4] In particular, some subspace of the Hilbert space of the quantum mechanics model admits an interpretation in terms of the secondquantized Fock.
		Finally, an interpretation of the completely reduced SYM theory as type IIB string theory has been advanced in [6] All three reduced SYM theories are closely related and, in the large N....
		On the other hand, the long distance behavior of D branes is conveniently captured by the closed string boundary state formalism 2, where the D branes are described by BRST invariant states and the interaction is computed by connecting them with closed string propagators [6, 7, 8, 5] In....
	citeseer.ist.psu.edu /context/92262/0 (1527 words)

	on gerbes and boundary states
		However, Hofman says in his paper that a category theory approach would be needed for a more fundamental consideration, and so it is interesting that his 1 and 2 forms seem very similar to those of John Baez in his category theory paper [hep-th/0206130] since they are both using a crossed module.
		You are very aware that no one really understands what strings are, but whatever they are their mathematics has to make sense and it may be preferable if this underlying math is fundamental and general enough so as to increase the likelihood of potential applications.
		Di Vecchia & A. Licardo: D-branes in string theory, I & II hep-th/9912161 & hep-th/9912275 Section 3 of part II discusses the couplig of the boundary state of the brane with form field excitations.
	www.pych-one.com /new-5655015-4397.html (9957 words)

	type IIA string theory concept from the Astronomy knowledge base (Site not responding. Last check: 2007-10-22)
		type IIA string theory concept from the Astronomy knowledge base
		Next superstring theory: type IIB string theory Up: superstring theory Previous superstring theory: type I string theory
		has date or a range of dates for which the theory was active
	www.csi.uottawa.ca:4321 /astronomy/typeIIAstringtheory.html (75 words)

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