Paper (*cross-listing*): gr-qc/0508057
Date: Sat, 13 Aug 2005 08:18:35 GMT (6kb)

Title: Exactly solvable model of wormhole supported by phantom energy

Authors: O.B.Zaslavskii

Comments: 6 pages. Accepted for publication in Phys. Rev. D as Rapid
Communication
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We have found a simple exact solution of spherically-symmetrical Einstein
equations describing a wormhole for an inhomogeneous distribution of the
phantom energy. The equation of state is linear but highly anisotropic: while
the radial pressure is negative, the transversal one is positive. At infinity
the spacetime is not asymptotically flat and possesses on each side of the
bridge a regular cosmological Killing horizon with an infinite area,
impenetrable for any particles. This horizon does not arise if the wormhole
region is glued to the Schwarzschild region. In doing so, the wormhole can
enclose an arbitrary amount of the phantom energy. The configuration under
discussion has a limit in which the phantom energy turns into the string dust,
the areal radius tends to the constant. In this limit, the strong gravitational
mass defect is realized in that the gravitational active mass is finite and
constant while the proper mass integrated over the total manifold is infinite.

\\ ( http://arXiv.org/abs/gr-qc/0508057 , 6kb)