Wilson Loops in string duals of Walking and Flavored Systems (2009)
Nunez, Carlos, Piai, Maurizio, Rago, Antonio
We consider the VEV of Wilson loop operators by studying the behavior of string probes in solutions of Type IIB string theory generated by Nc D5 branes wrapped on an internal manifold. In particular,...
A light scalar from walking solutions in gauge-string duality (2009)
Elander, Daniel, Nunez, Carlos, Piai, Maurizio
We consider the type-IIB background generated by the strong-coupling limit of Nc D5 branes wrapped on S2, and focus our attention on a special class of solutions that exhibit walking behavior. We...
Walking Dynamics from String Duals (2008)
Nunez, Carlos, Papadimitriou, Ioannis, Piai, Maurizio
Within the context of a String Theory dual to N=1 gauge theories with gauge group SU(Nc) and large Nc, we identify a class of solutions of the background equations for which a suitably defined dual...
String duals of two-dimensional (4,4) supersymmetric gauge theories (2008)
Arean, Daniel, Merlatti, Paolo, Nunez, Carlos, Ramallo, Alfonso V.
We study duals to field theories in two dimensions with N=(4,4) SUSY. The string backgrounds reproduce certain non-perturbative aspects of the dual field theory with a large number of colors N_c and...
Comments on the String dual to N=1 SQCD (2008)
Hoyos-Badajoz, Carlos, Nunez, Carlos, Papadimitriou, Ioannis
We study the String dual to N=1 SQCD deformed by a quartic superpotential in the quark superfields. We present a unified view of the previous results in the literature and find new exact solutions...
Heavy quark potential with dynamical flavors: a first order transition (2008)
Bigazzi, Francesco, Cotrone, Aldo L., Nunez, Carlos, Paredes, Angel
We study the static potential between external quark-antiquark pairs in a strongly coupled gauge theory with a large number of colors and massive dynamical flavors, using a dual string description....
Elaborations on the String Dual to N=1 SQCD (2007)
Casero, Roberto, Nunez, Carlos, Paredes, Angel
In this paper we make further refinements to the duality proposed between N=1 SQCD and certain string (supergravity plus branes) backgrounds, working in the regime of comparable large number of...
Backreacting Flavors in the Klebanov-Strassler Background (2007)
Benini, Francesco, Canoura, Felipe, Cremonesi, Stefano, Nunez, Carlos, Ramallo, Alfonso V.
n this paper we present new analytic solutions of pure Type IIB supergravity plus D7-branes describing the addition of an arbitrary number of flavors to the Klebanov-Tseytlin and Klebanov-Strassler...
Unquenched Flavors in the Klebanov-Witten Model (2007)
Benini, Francesco, Canoura, Felipe, Cremonesi, Stefano, Nunez, Carlos, Ramallo, Alfonso V.
Using AdS/CFT, we study the addition of an arbitrary number of backreacting flavors to the Klebanov-Witten theory, making many checks of consistency between our new Type IIB plus branes solution and...
Backreacting Flavors in the Klebanov-Strassler Background (2007)
Benini, Francesco, Canoura, Felipe, Cremonesi, Stefano, Nunez, Carlos, Ramallo, Alfonso V.
In this paper we present new analytic solutions of pure Type IIB supergravity plus D7-branes describing the addition of an arbitrary number of flavors to the Klebanov-Tseytlin and Klebanov-Strassler...
Cosmology from String Theory (2007)
Anchordoqui, Luis, Goldberg, Haim, Nawata, Satoshi, Nunez, Carlos
We explore the cosmological content of Salam-Sezgin six dimensional supergravity, and find a solution to the field equations in qualitative agreement with observation of distant supernovae,...
Unquenched Flavors in the Klebanov-Witten Model (2006)
Benini, Francesco, Canoura, Felipe, Cremonesi, Stefano, Nunez, Carlos, Ramallo, Alfonso V.
Using AdS/CFT, we study the addition of an arbitrary number of backreacting flavors to the Klebanov-Witten theory, making many checks of consistency between our new Type IIB plus branes solution and...
Towards the String Dual of N=1 SQCD-like Theories (2006)
Casero, Roberto, Nunez, Carlos, Paredes, Angel
We construct supergravity plus branes solutions, which we argue to be related to 4d N=1 SQCD with a quartic superpotential. The geometries depend on the ratio Nf/Nc which can be kept of order one,...
Glueballs of Super Yang-Mills from Wrapped Branes (2005)
In this paper we study qualitative features of glueballs in N=1 SYM for models of wrapped branes in IIA and IIB backgrounds. The scalar mode, 0++ is found to be a mixture of the dilaton and the...
Dipole Deformations of N=1 SYM and Supergravity backgrounds with U(1) X U(1) global symmetry (2005)
We study SL(3,R) deformations of a type IIB background based on D5 branes that is conjectured to be dual to N=1 SYM. We argue that this deformation of the geometry correspond to turning on a dipole...
Quantum Relaxation of the Cosmological Constant (2005)
We describe a mechanism that drives the Cosmological Constant to zero value. This mechanism is based on the quantum triviality of $\lambda \phi^4$ field theory and works in $AdS$ space. Some...
Probing Split Supersymmetry with Cosmic Rays (2004)
Anchordoqui, Luis, Goldberg, Haim, Nunez, Carlos
A striking aspect of the recently proposed split supersymmetry is the existence of heavy gluinos which are metastable because of the very heavy squarks which mediate their decay. In this paper we...
Rotating membranes on G_2 manifolds, logarithmic anomalous dimensions and N=1 duality (2002)
Hartnoll, Sean A., Nunez, Carlos
We show that the $E-S \sim \log S$ behaviour found for long strings rotating on $AdS_5\times S^5$ may be reproduced by membranes rotating on $AdS_4\times S^7$ and on a warped $AdS_5$ M-theory...
RG flows from Spin(7), CY 4-fold and HK manifolds to AdS, Penrose limits and pp waves (2002)
Gursoy, Umut, Nunez, Carlos, Schvellinger, Martin
We obtain explicit realizations of holographic renormalization group (RG) flows from M-theory, from E^{2,1} \times Spin(7) at UV to AdS_4 \times \tilde{S^7} (squashed S^7) at IR, from E^{2,1} \times...
Fermions in Bosonic String Theories (2001)
David, Justin R., Minwalla, Shiraz, Nunez, Carlos
We generalize the Jackiw-Rebbi-Hasenfratz-'t Hooft construction of fermions from bosons to demonstrate the fermionic nature of certain bound states involving SU(N) instantons in even spatial...
Brane Worlds, String Cosmology, and AdS/CFT (2001)
Anchordoqui, Luis, Edelstein, Jose, Nunez, Carlos, Bergliaffa, Santiago Perez, Schvellinger, Martin, Trobo, Marta, ...
Using the thin-shell formalism we discuss the motion of domain walls in de Sitter and anti-de Sitter (AdS) time-dependent bulks. This motion results in a dynamics for the brane scale factor. We show...
D6 branes and M theory geometrical transitions from gauged supergravity (2001)
Edelstein, Jose D., Nunez, Carlos
We study the supergravity duals of supersymmetric theories arising in the world-volume of D6 branes wrapping holomorphic two-cycles and special Lagrangian three-cycles within the framework of eight...
Supergravity duals of gauge theories from F(4) gauged supergravity in six dimensions (2001)
Nunez, Carlos, Park, I. Y., Schvellinger, Martin, Tran, Tuan A.
We construct supergravity solutions dual to twisted field theories that are the worldvolume theories of D4-branes wrapped on 2, 3-cycles, and NS-fivebranes on 3-cycles. We first obtain the solutions...
Towards the large N limit of pure N=1 super Yang Mills (2000)
Maldacena, Juan M., Nunez, Carlos
We find the gravity solution corresponding to a large number of NS or D fivebranes wrapped on a two sphere so that we have pure ${\cal N}=1$ super Yang-Mills in the IR. The supergravity solution is...
Quantum Cosmology and AdS/CFT (2000)
Anchordoqui, Luis, Nunez, Carlos, Olsen, Kasper
In this paper we study the creation of brane-worlds in $AdS$ bulk. We first consider the simplest case of onebranes in $AdS_3$. In this case we are able to properly describe the creation of a...
Supergravity description of field theories on curved manifolds and a no go theorem (2000)
Maldacena, Juan, Nunez, Carlos
In the first part of this paper we find supergravity solutions corresponding to branes on worldvolumes of the form $R^d \times \Sigma$ where $\Sigma$ is a Riemann surface. These theories arise when...
From Noncommutative Bosonization to S-Duality (2000)
Nunez, Carlos, Olsen, Kasper, Schiappa, Ricardo
We extend standard path-integral techniques of bosonization and duality to the setting of noncommutative geometry. We start by constructing the bosonization prescription for a free Dirac fermion...
Supersymmetry and Bosonization in Three Dimensions (1997)
Edelstein, Jose D., Nunez, Carlos
We discuss on the possible existence of a supersymmetric invariance in purely fermionic planar systems and its relation to the fermion-boson mapping in three-dimensional quantum field theory. We...
Supersymmetric Electroweak Cosmic Strings (1996)
Edelstein, Jose D., Nunez, Carlos
We study the connection between $N=2$ supersymmetry and a topological bound in a two-Higgs-doublet system with an $SU(2)\times U(1)_Y\times U(1)_{Y^{\prime}}$ gauge group. We derive the Bogomol'nyi...