Non-abelian (p,q) strings in the warped deformed conifold

Thomas, Steven; Ward, John

doi:10.1088/1126-6708/2006/12/057

Cited by 21 publications

(34 citation statements)

References 54 publications

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“…This is not entirely unexpected since this has a dual description in terms of a single classical object due to the Myers effect [8]. In fact we expect our model to be the field theory dual of a supergravity solution consisting of a single D5-brane wrapping a nontrivial two-cycle with N units of magnetic flux on the world volume [14]. However in order for this configuration to be stable we will generally have to ensure that there is additional world-volume electric flux on the wrapped brane.…”

Section: Discussionmentioning

confidence: 64%

IR inflation from multiple branes

Thomas

Ward

2007

Phys. Rev. D

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In this paper we examine the IR inflation scenario using the Dirac-Born-Infeld action, where we have N multiple branes located near the tip of a warped geometry. At large N the solutions are similar in form to the more traditional single brane models; however, we find that it is difficult to simultaneously satisfy the Wilkinson Microwave Anisotropy Probe bounds on the scalar amplitude and the scalar spectral index. We go on to examine two new solutions where N 2 and N 3, respectively, which both have highly nonlinear actions. The sound speed in both cases is dramatically different from previous works, and for the N 3 case it can actually be zero. We show that inflation is possible in both frameworks, and find that the scalar spectral index is bounded from above by unity. The levels of non-Gaussian fluctuations are smaller in the N 2 case compared to the single brane models, while those in the N 3 case are much larger.

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Section: Discussionmentioning

confidence: 64%

IR inflation from multiple branes

Thomas

Ward

2007

Phys. Rev. D

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“…One interesting observation about this matching is that the field theory result is at large |n| (i.e. large winding number), whilst the (p, q)-string tension has large flux [26,27]. More concretely the matching on the field theory side was through the parameter pairing |n|η 2 , with a 0 T 1 on the string theory side, which suggests a relation between the symmetry breaking scale (set by η) and the string length.…”

Section: Discussionmentioning

confidence: 91%

A generalisation of the Nielsen-Olesen vortex: non-cylindrical strings in a modified abelian-higgs model

Lake

Ward

2011

J. High Energ. Phys.

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We modify the standard Abelian-Higgs model by introducing spatially-dependent couplings for the scalar and vector fields. We investigate static, non-cylindrically symmetric solutions of the resulting field equations and propose a pinch solution which interpolates between degenerate vacua along the string, labelled by ± |n|. This configuration corresponds to a vortex which shrinks to the Planck scale before re-emerging as an anti-vortex, resulting in the formation of a bead pair with one bead either side of the intersection. The solution is then topologically stable. A key assumption is that quantities such as phase and winding number, along with those which depend on them like the magnetic flux, become undefined at the Planck scale so that regions of opposite winding may be joined via a Planck-sized segment of neutral string. Similarities between this solution and the extra-dimensional windings of strings in type IIB string theory are discussed and a correspondence between field theory and string theory parameters is suggested. The spatial-dependence of the field couplings is found to have a natural interpretation in the string picture and results from the variation of the winding radius, giving rise to a varying (effective) string coupling. An interesting result is an estimate of the Higgs mass (at critical coupling) in terms of the parameters which define the Klebanov-Strassler geometry and which, in principle, may be constrained by cosmological observations.

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“…As studied in [20], (see also [21,22] for its dual prescription), a p; q-string in the KS throat is constructed from a wrapped D3-brane with q units of magnetic fluxes and p units of electric fluxes turned on in its world volume. The D3-brane is wrapped around a S 2 inside the S 3 , where each S 2 is determined by a slice of constant , given by p M :…”

Section: Collisions In a Warped Backgroundmentioning

confidence: 99%

Collision of cosmic superstrings

et al. 2008

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We study the formation of three-string junctions between p; q-cosmic superstrings, and collisions between such strings and show that kinematic constraints analogous to those found previously for collisions of Nambu-Goto strings apply here too, with suitable modifications to take account of the additional requirements of flux conservation. We examine in detail several examples involving collisions between strings with low values of p and q, and also examine the rates of growth or shrinkage of strings at a junction. Finally, we briefly discuss the formation of junctions for strings in a warped space, specifically with a Klebanov-Strassler throat, and show that similar constraints still apply with changes to the parameters taking account of the warping and the background flux.

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Non-abelian (p,q) strings in the warped deformed conifold

Cited by 21 publications

References 54 publications

IR inflation from multiple branes

IR inflation from multiple branes

A generalisation of the Nielsen-Olesen vortex: non-cylindrical strings in a modified abelian-higgs model

Collision of cosmic superstrings

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