The exact solution for a static spherically symmetric field outside a charged point particle is found in a non-linear U(1) gauge theory with a logarithmic Lagrangian. The electromagnetic self-mass is… (More)

We study geodesically complete, singularity free space-times induced by supersymmetric planar domain walls interpolating between Minkowski and anti-de Sitter (AdS4) vacua. A geodesically complete… (More)

Near a spinning point particle in (2+1)-dimensional gravity (or near an infinitely thin, straight, spinning string in 3+1 dimensions) there is a region of space-time with closed timelike curves.… (More)

We investigate gravitational effects of extreme, non-extreme and ultraextreme domain walls in the presence of a dilaton field φ. The dilaton is a scalar field without self-interaction that couples to… (More)

Non-extreme walls (bubbles with two insides) and ultra-extreme walls (bubbles of false vacuum decay) are discussed. Their respective energy densities are higher and lower than that of the… (More)