Strings in de Sitter space

Abstract

We study both global as well as local (Nielsen-Olesen) strings in de Sitter space. While these type of topological defects have been studied in the background of a de Sitter metric previously, we study here the full set of coupled equations. We find only ``closed'' solutions. The behaviour of the metric tensor of these solutions resembles that of ``supermassive'' strings with a curvature singularity at the cosmological horizon. For global strings (and the composite defect) we are able to construct solutions which are regular on the interval from the origin to the cosmological horizon if the global string core lies completely inside the horizon.

11 Revtex-pages including 5 ps-figures; v1: typos corrected, note added; v2: minor changes in conclusions

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• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Cosmic strings
• The dS/CFT Correspondence
• Inflation and the dS/CFT Correspondence
• Nonsingular global strings
• Complete Classification of the String-like Solutions of the Gravitating Abelian Higgs Model
• Gravitating Magnetic Monopole in the Global Monopole Spacetime
• Classical solutions of the Gravitating Abelian Higgs Model
• Vortices in De Sitter Spacetimes
• Interaction of global and local monopoles
• Critical phenomena of gravitating monopoles in the spacetime of a global monopole

Cited by in corpus (25)

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• Fermionic vacuum polarization by a cosmic string in anti-de Sitter spacetime
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• Exotic composites: the decay of deficit angles in global-local monopoles
• Inflating branes inside abelian strings
• Effect of a positive cosmological constant on cosmic strings
• Cosmic strings in a space-time with positive cosmological constant
• Geodesics dynamics in the Linet-Tian spacetime with Lambda<0
• Non-Abelian cosmic strings in de Sitter and anti-de Sitter space
• Fermionic vacuum polarization in higher-dimensional global monopole spacetime
• Conformally flat sources for the Linet-Tian spacetime
• Cylindrically-Symmetric Solutions in Conformal Gravity
• Gravitating non-Abelian cosmic strings
• Exact String-Like Solutions in Conformal Gravity
• Localising gravity in composite monopole brane worlds without bulk cosmological constant
• Translation in Cylindrically Symmetric Vacuum
• Cosmic string with two interacting scalar fields
• Compact and extended objects from self-interacting phantom fields
• Static Cylindrical Symmetric Solutions in the Einstein-Aether Theory
• De Sitter Cosmic Strings and Supersymmetry
• Two species of semi-local cosmic strings in Abelian gauged ${\mathbb{CP}}^2$-sigma models coupled to gravity
• Abelian cosmic string in the extended Starobinsky model of gravity
• Electromagnetic vacuum stresses and energy fluxes induced by a cosmic string in de Sitter spacetime
• Non-Abelian cosmic string in the Starobinsky model of gravity