Frustrated Expectations: Defect Networks and Dark Energy

Details Frustrated Expectations: Defect Networks and Dark Energy Frustrated Expectations: Defect Networks and Dark Energy

2006-02-24

arxiv.org/abs/astro-ph/0602540v1

Phys.Rev. D73 (2006) 123519

Astronomy and Astrophysics

Astrophysics

9 pages, 8 figures

Scientific paper

10.1103/PhysRevD.73.123519

We discuss necessary conditions for a network of cosmic domain walls to have a chance of providing the dark energy that might explain the recent acceleration of the universe. We derive a strong bound on the curvature of the walls, which shows that viable candidate networks must be fine-tuned and non-standard. We also discuss various requirements that any stable lattice of frustrated walls must obey. We conjecture that, even though one can build (by hand) lattices that would be stable, no such lattices will ever come out of realistic domain wall forming cosmological phase transitions. We provide some simple numerical simulations that illustrate our results and correct some misconceptions in the published literature, but a detailed numerical analysis is left for a companion paper.

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