Chaotic scalar fields as models for dark energy

Details Chaotic scalar fields as models for dark energy Chaotic scalar fields as models for dark energy

2003-10-17

arxiv.org/abs/astro-ph/0310479v4

Phys.Rev. D69 (2004) 123515

Astronomy and Astrophysics

Astrophysics

30 pages, 3 figures. Replaced by final version accepted by Phys. Rev. D

Scientific paper

10.1103/PhysRevD.69.123515

We consider stochastically quantized self-interacting scalar fields as suitable models to generate dark energy in the universe. Second quantization effects lead to new and unexpected phenomena is the self interaction strength is strong. The stochastically quantized dynamics can degenerate to a chaotic dynamics conjugated to a Bernoulli shift in fictitious time, and the right amount of vacuum energy density can be generated without fine tuning. It is numerically observed that the scalar field dynamics distinguishes fundamental parameters such as the electroweak and strong coupling constants as corresponding to local minima in the dark energy landscape. Chaotic fields can offer possible solutions to the cosmological coincidence problem, as well as to the problem of uniqueness of vacua.

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