1008.3111 (Peter K. F. Kuhfittig)

The stability of thin-shell wormholes with a phantom-like equation of
state    [PDF]

Peter K. F. Kuhfittig

This paper discusses the stability to linearized radial perturbations of spherically symmetric thin-shell wormholes with a "phantom-like" equation of state for the exotic matter at the throat: $P=\omega\sigma$, $\omega<0$, where $\sigma$ is the energy-density of the shell and $P$ the lateral pressure. This equation is analogous to the generalized Chaplygin-gas equation of state used by E.F. Eiroa. The analysis, which differes from Eiroa's in its basic approach, is carried out for wormholes constructed from the following spacetimes: Schwarzschild, de Sitter and anti de Sitter, Reissner-Nordstrom, and regular charged black-hole spacetimes, followed by black holes in dilaton and generalized dilaton-axion gravity.

View original: http://arxiv.org/abs/1008.3111