Dilaton Domain Walls and Dynamical Systems

Details Dilaton Domain Walls and Dynamical Systems Dilaton Domain Walls and Dynamical Systems

2005-10-14

arxiv.org/abs/hep-th/0510115v4

Class.Quant.Grav.23:441-464,2006

Physics

High Energy Physics

High Energy Physics - Theory

30 pp, 11 figs, significant revision of original. Minor additional corrections in version to appear in journal

Scientific paper

10.1088/0264-9381/23/2/010

Domain wall solutions of $d$-dimensional gravity coupled to a dilaton field $\sigma$ with an exponential potential $\Lambda e^{-\lambda\sigma}$ are shown to be governed by an autonomous dynamical system, with a transcritical bifurcation as a function of the parameter $\lambda$ when $\Lambda<0$. All phase-plane trajectories are found exactly for $\lambda=0$, including separatrices corresponding to walls that interpolate between $adS_d$ and $adS_{d-1} \times\bR$, and the exact solution is found for $d=3$. Janus-type solutions are interpreted as marginal bound states of these ``separatrix walls''. All flat domain wall solutions, which are given exactly for any $\lambda$, are shown to be supersymmetric for some superpotential $W$, determined by the solution.

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