Birth of the Brane Universe

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  • 12 January 2000
Abstract
Quantum cosmology of the brane universe is studied. It is shown that an inflating brane universe can be created from nothing and the wave function of the universe and the time-dependent Schrodinger equation for quantized scalar fields are the same as those obtained in the conventional 4-dimensional quantum cosmology if the bulk is exactly the Anti-de Sitter spacetime. The effect of the massive objects in the bulk is also discussed. This analysis tells us if the bulk deviates from the Anti-de Sitter spacetime, the presence of the extra dimension imprints a nontrivial effect on the quantum cosmology of the brane universe. This fact is important for the analysis of the quantum fluctuations in the brane inflationary scenario.

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