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

J. G. Russo·P. K. Townsend
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Abstract

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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J. G. Russo, P. K. Townsend. 2005-01-25. Cosmology as Relativistic Particle Mechanics: From Big Crunch to Big Bang. https://doi.org/10.1088/0264-9381%2F22%2F4%2F007

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