Two-fluid evolving Lorentzian wormholes

Mauricio Cataldo; Sergio del Campo

doi:10.1103/PhysRevD.85.104010

paper

Two-fluid evolving Lorentzian wormholes

arXiv:1204.0753 · doi:10.1103/PhysRevD.85.104010

Abstract

We investigate the evolution of a family of wormholes sustained by two matter components: one with homogeneous and isotropic properties $ρ (t)$ and another inhomogeneous and anisotropic $ρ_{in} (t, r)$ . The rate of expansion of these evolving wormholes is only determined by the isotropic and homogeneous matter component $ρ (t)$ . Particularly, we consider a family of exact two-fluid evolving wormholes expanding with constant velocity and satisfying the dominant and the strong energy conditions in the whole spacetime. In general, for the case of vanishing isotropic fluid $ρ (t)$ and cosmological constant $Λ$ the space expands with constant velocity, and for $ρ (t) = 0$ and $Λ \neq = 0$ the rate of expansion is determined by the cosmological constant. The considered here two-fluid evolving wormholes are a generalization of single fluid models discussed in previous works of the present authors [Phys.\ Rev.\ D {\bf 78}, 104006 (2008); Phys.\ Rev.\ D {\bf 79}, 024005 (2009)].

8 pages, to be published in Phys. Rev D

Two-fluid evolving Lorentzian wormholes

Abstract

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