Diversity in the Phoenix Universe

Lehners, Jean-Luc

doi:10.1103/PhysRevD.84.103518

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Diversity in the Phoenix Universe

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Lehners, Jean-Luc
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE;

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1107.4551
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PRD84_103518.pdf
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引用

Lehners, J.-L. (2011). Diversity in the Phoenix Universe. Physical Review D, 84(10):. doi:10.1103/PhysRevD.84.103518.

引用: https://hdl.handle.net/11858/00-001M-0000-000F-0143-1

要旨

It has recently been argued by Copeland et al. that in eleven dimensions two orbifold planes can collide and bounce in a regular way, even when the bulk metric is perturbed away from Milne spacetime to a Kasner solution. In this paper, we point out that as a consequence the global "phoenix" structure of the cyclic universe is significantly enriched. Spatially separated regions, with different density fluctuation amplitudes as well as different non-gaussian characteristics, are all physically realized. Those regions containing by far the most structure are specified by a fluctuation amplitude of Q ~ 10^{-4.5} and local non-gaussianity parameters f_{NL} ~ O(+/- 10) and g_{NL} ~ O(-10^3), in agreement with current observations.