Wormhole Dynamics. (21st January 2015)

• Record Type: Journal Article
• Authors: Shinkai, Hisa-aki; Torii, Takashi
• Is Part Of: Journal of physics. Number 574(2015)
• Page Start: 012056
• Publication Date: 2015-01-21
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/574/1/012056
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Wormholes are theoretical products in general relativity, and are popular tools in science fictions. We know numerically the four-dimensional Ellis wormhole solution (the so- called Morris-Thorne's traversable wormhole) is unstable against an input of scalar-pulse from one side. We investigate this feature for higher-dimensional versions, both in n -dimensional general relativity and in Gauss-Bonnet gravity. We derived Ellis-type wormhole solution in n - dimensional general relativity, and found existence of unstable modes in its linear perturbation analysis. We also evolved it numerically in dual-null coordinate system, and confirmed its instability. The wormhole throat will change into black-hole horizon for the input of (relatively) positive energy, while it will change into inflationary expansion for (relatively) negative energy input. If we add Gauss-Bonnet terms (higher curvature correction terms in gravity), then wormhole tends to expand (or change to black-hole) if the coupling constant α is positive (negative).