Argentina
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Cylindrical wormholes with positive cosmological constant
Fecha
2013-07Registro en:
Richarte, Martín Gustavo; Cylindrical wormholes with positive cosmological constant; American Physical Society; Physical Review D; 88; 2; 7-2013; 1-5; 027507
0556-2821
CONICET Digital
CONICET
Autor
Richarte, Martín Gustavo
Resumen
We construct cylindrical, traversable wormholes with finite radii by taking into account the cutand-paste procedure for the case of cosmic string manifolds with a positive cosmological constant. Under reasonable assumptions about the equation of state of the matter located at the shell, we find that the wormhole throat undergoes a monotonous evolution provided it moves at a constant velocity. In order to explore the dynamical nonlinear behaviour of the wormhole throat, we consider that the matter at the shell is supported by anisotropic Chaplygin gas, anti-Chaplygin gas, or a mixed of Chaplygin and anti-Chaplygin gases implying that wormholes could suffer an accelerated expansion or contraction but the oscillatory behavior seems to be forbidden.