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61
Brane/Flux Annihilation and the String Dual of a NonSupersymmetric Field Theory
, 2006
"... We consider the dynamics of p antiD3 branes inside the KlebanovStrassler geometry, the deformed conifold with M units of RR 3form flux around the S 3. We find that for p << M the system relaxes to a nonsupersymmetric NS 5brane “giant graviton ” configuration, which is classically stable, b ..."
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Cited by 170 (18 self)
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We consider the dynamics of p antiD3 branes inside the KlebanovStrassler geometry, the deformed conifold with M units of RR 3form flux around the S 3. We find that for p << M the system relaxes to a nonsupersymmetric NS 5brane “giant graviton ” configuration, which is classically stable, but quantum mechanically can tunnel to a nearby supersymmetric vacuum with M −p D3 branes. This decay mode is exponentially suppressed and proceeds via the nucleation of an NS 5brane bubble wall. We propose a dual field theory interpretation of the decay as the transition between a nonsupersymmetric “baryonic” branch and a supersymmetric “mesonic” branch of the corresponding SU(2M − p) × SU(M − p) low energy gauge theory. The NS 5brane tunneling process also provides a simple visualization of the The search for calculable and nontrivial nonsupersymmetric string vacua remains a problem of basic interest in string theory. In the context of AdS/CFT duality [1], this is related to the construction of gravitational “antiholographic” descriptions for nonsupersymmetric 4d quantum gauge theories. Here, we describe the construction of a simple nonsupersymmetric
Moduli Stabilization from Fluxes in a Simple IIB Orientifold
, 2002
"... We study novel type IIB compactifications on the T 6 /Z2 orientifold. This geometry arises in the Tdual description of Type I theory on T 6, and one normally introduces 16 spacefilling D3branes to cancel the RR tadpoles. Here, we cancel the RR tadpoles either partially or fully by turning on thre ..."
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Cited by 149 (10 self)
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We study novel type IIB compactifications on the T 6 /Z2 orientifold. This geometry arises in the Tdual description of Type I theory on T 6, and one normally introduces 16 spacefilling D3branes to cancel the RR tadpoles. Here, we cancel the RR tadpoles either partially or fully by turning on threeform flux in the compact geometry. The resulting (super)potential for moduli is calculable. We demonstrate that one can find many examples of N = 1 supersymmetric vacua with greatly reduced numbers of moduli in this system. A few examples with N> 1 supersymmetry or complete supersymmetry breaking are also discussed.
The giant inflaton
, 2002
"... We investigate a new mechanism for realizing slow roll inflation in string theory, based on the dynamics of p antiD3 branes in a class of mildly warped flux compactifications. Attracted to the bottom of a warped conifold throat, the antibranes then cluster due to a novel mechanism wherein the back ..."
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Cited by 30 (5 self)
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We investigate a new mechanism for realizing slow roll inflation in string theory, based on the dynamics of p antiD3 branes in a class of mildly warped flux compactifications. Attracted to the bottom of a warped conifold throat, the antibranes then cluster due to a novel mechanism wherein the background flux polarizes in an attempt to screen them. Once they are sufficiently close, the M units of flux cause the antibranes to expand into a fuzzy NS5brane, which for rather generic choices of p/M will unwrap around the geometry, decaying into D3branes via a classical process. We find that the effective potential governing this evolution possesses several epochs that can potentially support slowroll inflation, provided the process can be arranged to take place at a high enough energy scale, of about one or two orders of magnitude below the Planck energy; this scale, however, lies just outside the bounds of our approximations
N3 entropy of M5 branes from dielectric effect,” arXiv:1204.2711 [hepth
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Expanded Strings in the Background of NS5branes via a M2brane, a D2brane and D0branes
, 2001
"... Classical configurations of a M2brane, a D2brane and D0branes are investigated in the background of NS5branes. On the M2brane, we discuss three kinds of configurations, such as a sphere, a cylinder and a toruslike one. These are stabilized by virtue of the background fluxes of NS5branes. The ..."
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Cited by 14 (3 self)
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Classical configurations of a M2brane, a D2brane and D0branes are investigated in the background of NS5branes. On the M2brane, we discuss three kinds of configurations, such as a sphere, a cylinder and a toruslike one. These are stabilized by virtue of the background fluxes of NS5branes. The toruslike M2brane configuration has winding and momentum numbers of 11th direction, and in terms of the type IIA superstring theory, this corresponds to a toruslike D2brane with electric and magnetic fluxes on it. We also reproduce the same configuration from a nonabelian BornInfeld action for D0branes. It will be a construction of closed strings from D0branes. An electric flux quantization condition on the D2brane is also discussed in terms of D0branes. 1
Nonperturbative effects and Yukawa hierarchies
 in Ftheory SU(5) Unification, JHEP 1303
, 2013
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R.C.: Magnetic Catalysis of Chiral Symmetry Breaking. A Holographic Prospective
 Adv. High Energy Phys
, 2010
"... We review a recent investigation of the effect of magnetic catalysis of mass generation in holographic YangMills theories. We aim at a selfcontained and pedagogical form of the review. We provide a brief field theory background and review the basics of holographic flavordynamics. The main part of ..."
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Cited by 12 (1 self)
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We review a recent investigation of the effect of magnetic catalysis of mass generation in holographic YangMills theories. We aim at a selfcontained and pedagogical form of the review. We provide a brief field theory background and review the basics of holographic flavordynamics. The main part of the paper investigates the influence of external magnetic field to holographic gauge theories dual to the D3/D5and D3/D7brane intersections. Among the observed phenomena are the spontaneous breaking of a global internal symmetry, Zeeman splitting of the energy levels, and the existence of pseudo, Goldstone modes. An analytic derivation of the GellMannOaksRenner relation for the D3/D7 set up is reviewed. In the D3/D5 case, the pseudoGoldstone modes satisfy nonrelativistic dispersion relation. The studies reviewed confirm the universal nature of the magnetic catalysis of mass generation.