Cosmology as Relativistic Particle Mechanics: From Big Crunch to Big Bang

Details Cosmology as Relativistic Particle Mechanics: From Big Crunch to Big Bang Cosmology as Relativistic Particle Mechanics: From Big Crunch to Big Bang

2004-08-28

arxiv.org/abs/hep-th/0408220v3

Class.Quant.Grav. 22 (2005) 737-752

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 3 figures, references and comments added

Scientific paper

10.1088/0264-9381/22/4/007

Cosmology can be viewed as geodesic motion in an appropriate metric on an `augmented' target space; here we obtain these geodesics from an effective relativistic particle action. As an application, we find some exact (flat and curved) cosmologies for models with N scalar fields taking values in a hyperbolic target space for which the augmented target space is a Milne universe. The singularities of these cosmologies correspond to points at which the particle trajectory crosses the Milne horizon, suggesting a novel resolution of them, which we explore via the Wheeler-deWitt equation.

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