A Reduced Model of Noncommutative S-brane Spectrum

Abstract

CFT construction of S-branes describing the rolling and bouncing tachyons is analyzed in the context of a $\theta$-noncommutative deformation of minisuperspace. Half s-brane and s-brane in the noncommutative minisuperspace are analyzed and exact analytic solutions, involving the noncommutative parameter $\theta$ and compatible with the boundary conditions at infinity, are found. Comparison with the usual commutative minisuperspace is finally performed.

19 pages, latex, 2 eps figures; v2/v3 references added