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Dbranes, tachyons, and string field theory
, 2003
"... In these notes we provide a pedagogical introduction to the subject of tachyon condensation in Witten’s cubic bosonic open string field theory. We use both the lowenergy YangMills description and the language of string field theory to explain the problem of tachyon condensation on unstable Dbra ..."
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Cited by 76 (4 self)
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In these notes we provide a pedagogical introduction to the subject of tachyon condensation in Witten’s cubic bosonic open string field theory. We use both the lowenergy YangMills description and the language of string field theory to explain the problem of tachyon condensation on unstable D
LowEnergy Limit of Yang–Mills
, 2006
"... If the fundamental quarks of QCD are replaced by massless adjoint quarks the pattern of the chiral symmetry breaking drastically changes compared to the standard one. It becomes SU(Nf) →SO(Nf). While for Nf = 2 the chiral Lagrangian describing the “pion ” dynamics is wellknown, this is not the case ..."
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If the fundamental quarks of QCD are replaced by massless adjoint quarks the pattern of the chiral symmetry breaking drastically changes compared to the standard one. It becomes SU(Nf) →SO(Nf). While for Nf = 2 the chiral Lagrangian describing the “pion ” dynamics is wellknown, this is not the case at Nf> 2. We outline a general strategy for deriving chiral Lagrangians for the coset spaces Mk = SU(k)/SO(k), and study in detail the case of Nf = k = 3. We obtain two and fourderivatives terms in the chiral Lagrangian on the coset space M3 = SU(3)/SO(3), as well as the Wess–Zumino– Novikov–Witten term, in terms of an explicit parameterization of the quotient manifold. Then we discuss stable topological solitons supported by this Lagrangian. Aspects of relevant topological considerations scattered in the literature are reviewed. The same analysis applies to SO(N) gauge theories with Nf Weyl flavors in the vector representation. 1
Antide Sitter Space, Thermal Phase Transition, and Confinement in Gauge Theories
 Adv. Theor. Math. Phys
, 1998
"... The correspondence between supergravity (and string theory) on AdS space and boundary conformal field theory relates the thermodynamics of N = 4 super YangMills theory in four dimensions to the thermodynamics of Schwarzschild black holes in Antide Sitter space. In this description, quantum phenome ..."
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Cited by 1087 (4 self)
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The correspondence between supergravity (and string theory) on AdS space and boundary conformal field theory relates the thermodynamics of N = 4 super YangMills theory in four dimensions to the thermodynamics of Schwarzschild black holes in Antide Sitter space. In this description, quantum
The selfduality equations on a Riemann surface
 Proc. Lond. Math. Soc., III. Ser
, 1987
"... In this paper we shall study a special class of solutions of the selfdual YangMills equations. The original selfduality equations which arose in mathematical physics were defined on Euclidean 4space. The physically relevant solutions were the ones with finite action—the socalled 'instanton ..."
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Cited by 524 (6 self)
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In this paper we shall study a special class of solutions of the selfdual YangMills equations. The original selfduality equations which arose in mathematical physics were defined on Euclidean 4space. The physically relevant solutions were the ones with finite action—the socalled &apos
Dual superconductivity . . . in lowenergy YangMills theory. Part I.
, 2000
"... We show that the QCD vacuum (without dynamical quarks) is a dual superconductor at least in the lowenergy region in the sense that monopole condensation does really occur. In fact, we derive the dual GinzburgLandau theory (i.e., dual Abelian Higgs model) directly from the SU(2) YangMills theory b ..."
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We show that the QCD vacuum (without dynamical quarks) is a dual superconductor at least in the lowenergy region in the sense that monopole condensation does really occur. In fact, we derive the dual GinzburgLandau theory (i.e., dual Abelian Higgs model) directly from the SU(2) YangMills theory
The large N limit of superconformal field theories and supergravity
, 1998
"... We show that the large N limit of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravity on the product of AntideSitter spacetimes, spheres and other compact manifolds. This is shown by taking some branes in the full M/string theory and ..."
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Cited by 5673 (21 self)
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and then taking a low energy limit where the field theory on the brane decouples from the bulk. We observe that, in this limit, we can still trust the near horizon geometry for large N. The enhanced supersymmetries of the near horizon geometry correspond to the extra supersymmetry generators present
Skyrmions in Yang–Mills Theories
, 804
"... Dynamics of SU(Nc) Yang–Mills theories with Nf adjoint Weyl fermions is quite different from that of SU(Nc) gauge theories with fundamental quarks. The symmetry breaking pattern is SU(Nf) → SO(Nf). The corresponding sigma model supports Skyrmions whose microscopic identification is not immediately c ..."
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Dynamics of SU(Nc) Yang–Mills theories with Nf adjoint Weyl fermions is quite different from that of SU(Nc) gauge theories with fundamental quarks. The symmetry breaking pattern is SU(Nf) → SO(Nf). The corresponding sigma model supports Skyrmions whose microscopic identification is not immediately
String theory and noncommutative geometry
 JHEP
, 1999
"... We extend earlier ideas about the appearance of noncommutative geometry in string theory with a nonzero Bfield. We identify a limit in which the entire string dynamics is described by a minimally coupled (supersymmetric) gauge theory on a noncommutative space, and discuss the corrections away from ..."
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Cited by 801 (8 self)
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We extend earlier ideas about the appearance of noncommutative geometry in string theory with a nonzero Bfield. We identify a limit in which the entire string dynamics is described by a minimally coupled (supersymmetric) gauge theory on a noncommutative space, and discuss the corrections away from this limit. Our analysis leads us to an equivalence between ordinary gauge fields and noncommutative gauge fields, which is realized by a change of variables that can be described explicitly. This change of variables is checked by comparing the ordinary DiracBornInfeld theory with its noncommutative counterpart. We obtain a new perspective on noncommutative gauge theory on a torus, its Tduality, and Morita equivalence. We also discuss the D0/D4 system, the relation to Mtheory in DLCQ, and a possible noncommutative version of the sixdimensional (2, 0) theory. 8/99
Edge Detection
, 1985
"... For both biological systems and machines, vision begins with a large and unwieldy array of measurements of the amount of light reflected from surfaces in the environment. The goal of vision is to recover physical properties of objects in the scene, such as the location of object boundaries and the s ..."
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Cited by 1277 (1 self)
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and the structure, color and texture of object surfaces, from the twodimensional image that is projected onto the eye or camera. This goal is not achieved in a single step; vision proceeds in stages, with each stage producing increasingly more useful descriptions of the image and then the scene. The first clue
Results 1  10
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