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Scalar field cosmology in three-dimensions
We study an analytical solution to the Einstein's equations in
2+1-dimensions. The space-time is dynamical and has a line symmetry. The matter
content is a minimally coupled, massless, scalar field. Depending on the value
of certain parameters, this solution represents three distinct space-times. The
first one is flat space-time. Then, we have a big bang model with a negative
curvature scalar and a real scalar field. The last case is a big bang model
with event horizons where the curvature scalar vanishes and the scalar field
changes from real to purely imaginary.Comment: 11 pages, Revtex, no figues. Change in the physical interpretation of
the solutio
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