Series:

The London Relativity and Cosmology Seminar

Speaker:

Peter Hogan (UCD)

Date:

October 22nd, 2014 at 16:30

Room:

See Talk Details

Abstract:

The collision of two plane gravitational shock waves propagating in a vacuum generates a cosmological constant. When the plane gravitational waves are accompanied by plane electromagnetic shock waves then fine tuning of the amplitudes results in, arguably, the simplest post-collision space-time ever found. Finally a study of the histories of plane waves in space-times of constant curvature distinguishes de Sitter space-time from Anti de Sitter space-time in a natural way. - Room 516