On the Nature of the Generic Big Bang

Details On the Nature of the Generic Big Bang On the Nature of the Generic Big Bang

1998-01-06

arxiv.org/abs/gr-qc/9801010v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 5 figures, uses Revtex, epsf. Based on talk given at Symposium on Frontiers of Fundamental Physics, Hyderabad, India,

Scientific paper

Spatially homogeneous but possibly anisotropic cosmologies have two main types of singularities: (1) asymptotically velocity term dominated (AVTD) - (reversing the time direction) the universe evolves to the singularity with fixed anisotropic collapse rates ; (2) Mixmaster-the anisotropic collapse rates change in a deterministicaly chaotic way. Much less is known about spatially inhomogeneous universes. It has been claimed that a generic universe would evolve toward the singularity as a different Mixmaster universe at each spatial point. I shall discuss how to predict whether a cosmology has an AVTD or Mixmaster singularity and whether or not our numerical simulations agree with these predictions.

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