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Title: Thin-shell wormholes associated with global cosmic strings

Abstract

In this article we construct cylindrical thin-shell wormholes in the context of global cosmic strings. We study the stability of static configurations under perturbations preserving the symmetry and we find that the throat tends to collapse or expand, depending only on the direction of the velocity perturbation.

Authors:
;  [1];  [2]
  1. Instituto de Astronomia y Fisica del Espacio, C.C. 67, Suc. 28, 1428, Buenos Aires (Argentina)
  2. Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. I, 1428, Buenos Aires (Argentina)
Publication Date:
OSTI Identifier:
21010954
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.75.027501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGY; CYLINDRICAL CONFIGURATION; DISTURBANCES; STABILITY; STRING MODELS; SYMMETRY; VELOCITY

Citation Formats

Bejarano, Cecilia, Eiroa, Ernesto F., and Simeone, Claudio. Thin-shell wormholes associated with global cosmic strings. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.027501.
Bejarano, Cecilia, Eiroa, Ernesto F., & Simeone, Claudio. Thin-shell wormholes associated with global cosmic strings. United States. doi:10.1103/PHYSREVD.75.027501.
Bejarano, Cecilia, Eiroa, Ernesto F., and Simeone, Claudio. Mon . "Thin-shell wormholes associated with global cosmic strings". United States. doi:10.1103/PHYSREVD.75.027501.
@article{osti_21010954,
title = {Thin-shell wormholes associated with global cosmic strings},
author = {Bejarano, Cecilia and Eiroa, Ernesto F. and Simeone, Claudio},
abstractNote = {In this article we construct cylindrical thin-shell wormholes in the context of global cosmic strings. We study the stability of static configurations under perturbations preserving the symmetry and we find that the throat tends to collapse or expand, depending only on the direction of the velocity perturbation.},
doi = {10.1103/PHYSREVD.75.027501},
journal = {Physical Review. D, Particles Fields},
number = 2,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}
  • Previous analysis about thin-shell wormholes associated to cosmic strings are extended. More evidence is found supporting the conjecture that, under reasonable assumptions about the equations of state of matter on the shell, the configurations are not stable under radial velocity perturbations.
  • The class of spherically symmetric thin-shell wormholes provides a particularly elegant collection of exemplars for the study of traversable Lorentzian wormholes. In the present paper we consider linearized (spherically symmetric) perturbations around some assumed static solution of the Einstein field equations. This permits us to relate stability issues to the (linearized) equation of state of the exotic matter which is located at the wormhole throat. {copyright} 1995 The American Physical Society.
  • In this work we construct charged thin-shell Lorentzian wormholes in dilaton gravity. The exotic matter required for the construction is localized in the shell and the energy conditions are satisfied outside the shell. The total amount of exotic matter is calculated and its dependence with the parameters of the model is analyzed.
  • The generalized Darmois-Israel formalism for Einstein-Gauss-Bonnet theory is applied to construct thin-shell Lorentzian wormholes with spherical symmetry. We calculate the energy localized on the shell, and we find that for certain values of the parameters wormholes could be supported by matter not violating the energy conditions.
  • No abstract prepared.