Showing 2002 · hep-thShow all

28 papers · 2 filters

hep-th2002★ 3 cited

Chirality and fermion number in a knotted soliton background

Lisa Freyhult, Antti J. Niemi

We consider the coupling of a single Dirac fermion to the three component unit vector field which appears as an order parameter in the Faddeev model. Classically, the coupling is d…

hep-th2002★ 36 cited

Comparing strings in AdS(5)xS(5) to planar diagrams: an example

V. Pestun, K. Zarembo

The correlator of a Wilson loop with a local operator in N=4 SYM theory can be represented by a string amplitude in AdS(5)xS(5). This amplitude describes an overlap of the boundary…

hep-th2002★ 1.5k cited

The Bethe-Ansatz for N=4 Super Yang-Mills

J. A. Minahan, K. Zarembo

We derive the one loop mixing matrix for anomalous dimensions in N=4 Super Yang-Mills. We show that this matrix can be identified with the Hamiltonian of an integrable SO(6) spin c…

hep-th2002★ 33 cited

D-branes in N=2 WZW models

Ulf Lindstrom, Maxim Zabzine

We briefly review the construction of N=2 WZW models in terms of Manin triples. We analyse the restrictions which should be imposed on the gluing conditions of the affine currents…

hep-th2002★ 29 cited

Superspace Formulation of 4D Higher Spin Gauge Theory

J. Engquist, E. Sezgin, P. Sundell

Interacting AdS_4 higher spin gauge theories with N \geq 1 supersymmetry so far have been formulated as constrained systems of differential forms living in a twistor extension of 4…

hep-th2002★ 71 cited

Can MAP and Planck map Planck physics?

L. Bergstrom, U. H. Danielsson

We investigate whether a recently proposed modulation of the power spectrum of primordial density fluctuations generated through transplankian (maybe stringy) effects during inflat…

hep-th2002★ 32 cited

Miracles and complementarity in de Sitter space

Ulf H. Danielsson, Daniel Domert, Martin Olsson

In this paper we consider a scenario, consisting of a de Sitter phase followed by a phase described by a scale factor , where , which can be viewed as an i…

hep-th2002★ 103 cited

On the consistency of de Sitter vacua

Ulf H. Danielsson

In this paper the consistency of the de Sitter invariant -vacua, which have been introduced as simple tools to study the effects of transplanckian physics, is investigated. In p…

hep-th2002★ 52 cited

Open string fluctuations in AdS_5xS^5 and operators with large R-charge

K. Zarembo

A semiclassical string description is given for correlators of Wilson loops with local operators in N=4 SYM theory in the regime when operators carry parametrically large R-charge.…

hep-th2002★ 33 cited

String theory and the Classical Stability of Plane Waves

D. Brecher, J. P. Gregory, P. M. Saffin

The presence of fields with negative mass-squared typically leads to some form of instability in standard field theories. The observation that, at least in the light-cone gauge, st…

hep-th2002★ 34 cited

Exact Solutions in Open Bosonic String Field Theory and Marginal Deformation in CFT

J. Kluson

In this paper we continue our study f the exact solution in open bosonic string field theory. We present new solution in the string field theory defined on the background correspon…

hep-th2002★ 49 cited

N=2 Boundary conditions for non-linear sigma models and Landau-Ginzburg models

Ulf Lindstrom, Maxim Zabzine

We study N=2 nonlinear two dimensional sigma models with boundaries and their massive generalizations (the Landau-Ginzburg models). These models are defined over either Kahler or b…

hep-th2002★ 176 cited

Circular Semiclassical String Solutions on AdS_5 x S_5

Joseph A. Minahan

We discuss two semiclassical string solutions on AdS_5\times S_5. In the first case, we consider a multiwrapped circular string pulsating in the radial direction of AdS_5, but fixe…

hep-th2002★ 29 cited

Wilson loops in N=4 SYM theory: rotation in S5

A. A. Tseytlin, K. Zarembo

We study Wilson loops in N=4 SYM theory which are non-constant in the scalar (S5) directions and open string solutions associated with them in the context of AdS/CFT correspondence…

hep-th2002★ 70 cited

On N=1,2,4 Higher Spin Gauge Theories in Four Dimensions

J. Engquist, E. Sezgin, P. Sundell

We study N=1,2,4 higher spin superalgebras in four dimensions and higher spin gauge theories based on them. We extend the existing minimal N=2,4 theories and find a minimal N=1 the…

hep-th2002★ 35 cited

Phases of bosonic strings and two dimensional gauge theories

Antti J. Niemi

We suggest that the extrinsic curvature and torsion of a bosonic string can be employed as variables in a two dimensional Landau-Ginzburg gauge field theory. Their interpretation i…

hep-th2002★ 37 cited

Kappa-symmetric non-abelian Born-Infeld actions in three dimensions

J. M. Drummond, P. S. Howe, U. Lindstrom

A superembedding construction of general non-abelian Born-Infeld actions in three dimensions is described. These actions have rigid target space and local worldvolume supersymmetry…

hep-th2002★ 125 cited

Inflation, holography, and the choice of vacuum in de Sitter space

Ulf H. Danielsson

A family of de Sitter vacua introduced in hep-th/0203198 as plausible initial conditions for inflation, are discussed from the point of view of de Sitter holography. The vacua are…

hep-th2002★ 90 cited

Rolling the tachyon in super BSFT

Joseph A. Minahan

We investigate the rolling of the tachyon on the unstable D9 brane in Type IIA string theory by studying the BSFT action. The action is known for linear profiles of the tachyon, wh…

hep-th2002★ 152 cited

Supersymmetric Wilson loops

K. Zarembo

I construct 1/16, 1/8 and 1/4 BPS Wilson loops in N=4 supersymmetric Yang-Mills theory and argue that expectation values of 1/4 BPS loops do not receive quantum corrections. At str…

hep-th2002★ 99 cited

Analysis of Higher Spin Field Equations in Four Dimensions

E. Sezgin, P. Sundell

The minimal bosonic higher spin gauge theory in four dimensions contains massless particles of spin s=0,2,4,.. that arise in the symmetric product of two spin 0 singletons. It is b…

hep-th2002★ 599 cited

Massless Higher Spins and Holography

E. Sezgin, P. Sundell

We treat free large N superconformal field theories as holographic duals of higher spin (HS) gauge theories expanded around AdS spacetime with radius R. The HS gauge theories conta…

hep-th2002★ 43 cited

Non-commutative gauge theory of twisted D-branes

Anton Yu. Alekseev, Stefan Fredenhagen, Thomas Quella +1

In this work we propose new non-commutative gauge theories that describe the dynamics of branes localized along twisted conjugacy classes on group manifolds. Our proposal is based…

hep-th2002★ 23 cited

Marginal Deformations In the Open Bosonic String Field Theory for N D0-branes

J. Kluson

In this short note we give an example of the exact solution of the open bosonic string field theory defined on the background of coincided D0-branes. This solution leads to the…