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Journal Article

On the Creation of the Universe via Ekpyrotic Instantons

MPS-Authors
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Lehners,  Jean-Luc
String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1406.5896.pdf
(Preprint), 894KB

PLB742_167.pdf
(Any fulltext), 440KB

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Citation

Battarra, L., & Lehners, J.-L. (2015). On the Creation of the Universe via Ekpyrotic Instantons. Physics Letters B, 742, 167-171. doi:10.1016/j.physletb.2015.01.028.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-9895-5
Abstract
We present a new class of complex instantons in the context of ekpyrotic cosmological theories. These instantons, which satisfy the "no-boundary" boundary conditions, describe the emergence of a classical, contracting universe out of nothing. The ekpyrotic attractor is essential in guaranteeing an evolution towards a real, Lorentzian history of the universe. In the context of the no-boundary proposal, the relative probability for such ekpyrotic histories compared to inflationary ones is very high -- in fact, assuming a bounce can be incorporated, these new instantons currently describe the most likely origin of the universe.