Holographic chiral shear waves from anomaly (2009)
We study dispersion relations of hydrodynamic waves of hot N=4 SYM plasma at strong coupling with a finite U(1) R-charge chemical potential via holography. We first provide complete equations of...
Holographic Chiral Magnetic Conductivity (2009)
We present holographic computations of the time-dependent chiral magnetic conductivity in the framework of gauge/gravity correspondence. Chiral magnetic effect is a phenomenon where an...
Parity asymmetric boost invariant plasma in AdS/CFT correspondence (2009)
We consider a simple extension to the previously found gravity solution corresponding to a boost invariant Bjorken plasma, by allowing components that are asymmetric under parity flipping of the...
Electromagnetic Nucleon-to-Delta Transition in Holographic QCD (2009)
Grigoryan, Hovhannes R., Lee, T. -S. H., Yee, Ho-Ung
We study nucleon-to-delta electromagnetic transition form factors and relations between them within the framework of holographic dual model of QCD proposed by Sakai and Sugimoto. In this setup,...
Holographic nonlinear hydrodynamics from AdS/CFT with multiple/non-Abelian symmetries (2009)
We study viscous hydrodynamics of hot conformal field theory plasma with multiple/non-Abelian symmetries in the framework of AdS/CFT correspondence, using a recently proposed method of directly...
Fate of Z(N) walls in hot holographic QCD (2009)
We first study Z(N) walls in a deconfined phase of Witten's D4-brane background of pure SU(N) Yang-Mills theory, motivated by a recent work in the case of N=4 SYM. Similarly to it, we propose that...
Weak Interaction in Holographic QCD (2009)
We present a recent proposal of a simple prescription for including low-energy weak-interactions into the framework of holographic QCD, based on the standard AdS/CFT dictionary of double-trace...
The Shape of Mesons in Holographic QCD (2008)
We point out that orbital angular momentum of the quark-antiquark pair inside light mesons of low spins can provide a clue for the holographic dual string model of large N QCD. Our discussion leads...
Weak-Interacting Holographic QCD (2008)
We propose a simple prescription for including low-energy weak-interactions into the framework of holographic QCD, based on the standard AdS/CFT dictionary of double-trace deformations. As our...
Holographic Monopole Catalysis of Baryon Decay (2008)
Hong, Deog Ki, Lee, Ki-Myeong, Park, Cheonsoo, Yee, Ho-Ung
We study how monopole catalysis of baryon decay is realized in holographic QCD. Physics of monopole catalysis becomes much simpler in holographic description as it occurs due to the violation of the...
Quark Mass Deformation of Holographic Massless QCD (2008)
Hashimoto, Koji, Hirayama, Takayuki, Lin, Feng-Li, Yee, Ho-Ung
We propose several quark mass deformations of the holographic model of massless QCD using the D4/D8/D8bar brane configuration proposed by Sakai and Sugimoto. The deformations are based on introducing...
Nucleon Form Factors and Hidden Symmetry in Holographic QCD (2007)
Hong, Deog Ki, Rho, Mannque, Yee, Ho-Ung, Yi, Piljin
The vector dominance of the electromagnetic form factors both for mesons and baryons arises naturally in holographic QCD, where both the number of colors and the 't Hooft coupling are taken to be...
The Electric Dipole Moment of the Nucleons in Holographic QCD (2007)
Hong, Deog Ki, Kim, Hyun-Chul, Siwach, Sanjay, Yee, Ho-Ung
We introduce the strong CP-violation in the framework of AdS/QCD model and calculate the electric dipole moments of nucleons as well as the CP-violating pion-nucleon coupling. Our holographic...
Holographic Nuclear Matter in AdS/QCD (2007)
Kim, Youngman, Lee, Chang-Hwan, Yee, Ho-Ung
We study the physics with finite nuclear density in the framework of AdS/QCD with holographic baryon field included. Based on a mean field type approach, we introduce the nucleon density as a...
Dynamics of Baryons from String Theory and Vector Dominance (2007)
Hong, Deog Ki, Rho, Mannque, Yee, Ho-Ung, Yi, Piljin
We consider a holographic model of QCD from string theory, a la Sakai and Sugimoto, and study baryons. In this model, mesons are collectively realized as a five-dimensional \$U(N_F)=U(1)\times...
Chiral Dynamics of Baryons from String Theory (2007)
Hong, Deog Ki, Rho, Mannque, Yee, Ho-Ung, Yi, Piljin
We study baryons in an AdS/CFT model of QCD by Sakai and Sugimoto, realized as small instantons with fundamental string hairs. We introduce an effective field theory of the baryons in the...
AdS/CFT with Tri-Sasakian Manifolds (2006)
We consider generic toric Tri-Sasakian 7-manifolds X_7 in the context of M-theory on AdS_4 X X_7 and study their AdS/CFT correspondence to N=3 SCFT in 3D spacetime. We obtain volumes of Tri-Sasakian...
Hong, Deog Ki, Inami, Takeo, Yee, Ho-Ung
We construct a holographic model for baryons in the context of AdS/QCD and study the spin-1/2 nucleon spectra and its couplings to mesons, taking fully account of the effects from the chiral symmetry...
BPS String Webs in the 6-dim (2,0) Theories (2006)
In the Coulomb phase of the 6-dim (2,0) superconformal theories, the 1/4, 1/8, 1/16 BPS selfdual string webs are argued to exist such that the spatial SO(5) and internal SO(5) rotations are...
New $AdS_4\times X_7$ Geometries with $\CN=6$ in M Theory (2006)
We study supersymmetric AdS_4 x X_7 solutions of 11-dim supergravity where the tri-Sasakian space X_7 has generically U(1)^2\times SU(2)_R isometry. The compact and regular 7-dim spaces...
Supertubes in Field Theories (2006)
Kim, Seok, Lee, Ki-Myeong, Yee, Ho-Ung
To a domain wall or string object, Noether charge and topological spatial objects can be attracted, forming a composite BPS (Bogomolny-Prasad-Sommerfield) object. We consider two field theories and...
Holographic Estimate of Oblique Corrections for Technicolor (2006)
We study the oblique corrections to the electroweak interaction in the holographic model of technicolor theories. The oblique S parameter is expressed in terms of a solution to the equations of...
Tachyon Kinks in Boundary String Field Theory (2006)
Kim, Chanju, Kim, Yoonbai, Kwon, O-Kab, Yee, Ho-Ung
We study tachyon kinks with and without electromagnetic fields in the context of boundary string field theory. For the case of pure tachyon only an array of kink-antikink is obtained. In the presence...
New BPS Objects in N=2 Supersymmetric Gauge Theories (2005)
We explore BPS soliton configurations in N=2 supersymmetric Yang-Mills theory with matter fields arising from parallel D3 branes on D7 branes. Especially we focus on two parameter family of 1/8 BPS...
1/2 BPS Geometries of M2 Giant Gravitons (2005)
Bak, Dongsu, Siwach, Sanjay, Yee, Ho-Ung
We construct the general 1/2 BPS M2 giant graviton solutions asymptotic to the eleven-dimensional maximally supersymmetric plane wave background, based on the recent work of Lin, Lunin and Maldacena....
Separation of Spontaneous Chiral Symmetry Breaking and Confinement via AdS/CFT Correspondence (2004)
We analyze, in the framework of AdS/CFT correspondence, the gauge theory phase structure that are supposed to be dual to the recently found non-supersymmetric dilatonic deformations to AdS_5 X S^5 in...
Exactly Soluble Dynamics of (p,q) String Near Macroscopic Fundamental Strings (2004)
Bak, Dongsu, Rey, Soo-Jong, Yee, Ho-Ung
We study dynamics of Type IIB bound-state of a Dirichlet string and n fundamental strings in the background of N fundamental strings. Because of supergravity potential, the bound-state string is...
The N=1* Theories on R^{1+2} X S^1 with Twisted Boundary Conditions (2004)
Kim, Seok, Lee, Ki-Myeong, Yee, Ho-Ung, Yi, Piljin
We explore the N=1* theories compactified on a circle with twisted boundary conditions. The gauge algebra of these theories are the so-called twisted affine Lie algebra. We propose the exact...
A Note on AdS/CFT Dual of SL(2,Z) Action on 3D Conformal Field Theories with U(1) Symmetry (2004)
In this letter, we elaborate on the SL(2,Z) action on three dimensional conformal field theories with U(1) symmetry introduced by Witten, by trying to give an explicit verification of the claim...
Open/Closed Duality, Unstable D-Branes, and Coarse-Grained Closed Strings (2004)
At the final stage of unstable D-brane decay in the effective field theory approach, all energy and momentum of the initial state are taken up by two types of fluids, known as string fluid and...
Holography, Dimensional Reduction and the Bekenstein Bound (2003)
We consider dimensional reduction of the lightlike holography of the covariant entropy bound from D+1 dimensional geometry of M X S to the D dimensional geometry M. With a warping factor, the local...
Explorations of universal extra dimensions / (2003)
Thesis (Ph. D.)--Yale University, 2003.
Explorations of universal extra dimensions [microform] / (2003)
Thesis (Ph. D.)--Yale University, 2003.
Universal Extra Dimensions and the Higgs Boson Mass (2002)
Appelquist, Thomas, Yee, Ho-Ung
We study the combined constraints on the compactification scale 1/R and the Higgs mass m_H in the standard model with one or two universal extra dimensions. Focusing on precision measurements and...
Neutrinos Vis-a-vis the Six-Dimensional Standard Model (2002)
Appelquist, Thomas, Dobrescu, Bogdan A., Ponton, Eduardo, Yee, Ho-Ung
We examine the origin of neutrino masses and oscillations in the context of the six-dimensional standard model. The space-time symmetries of this model explain proton stability and forbid Majorana...
Proton Stability in Six Dimensions (2001)
Appelquist, Thomas, Dobrescu, Bogdan A., Ponton, Eduardo, Yee, Ho-Ung
We show that Lorentz and gauge invariance explain the long proton lifetime within the standard model in six dimensions. The baryon-number violating operators have mass dimension 15 or higher. Upon...