Aether, Dark Energy, and String Compactifications
arXiv:2108.07536 · doi:10.1098/rsta.2021.0185
Abstract
The 19th century Aether died with Special Relativity but was resurrected by General Relativity in the form of dark energy; a tensile material with tension equal to its energy density. Such a material is provided by the D-branes of string-theory; these can support the fields of supersymmetric particle-physics, although their energy density is cancelled by orientifold singularities upon compactification. Dark energy can still arise from supersymmetry-breaking anti-D-branes but it is probably time-dependent. Recent results on time-dependent compactifications to an FLRW universe with late-time accelerated expansion are reviewed.
arXiv comment12 pp. Journal format. Contribution to the special edition of the Philosophical Transactions A of the Royal Society focused on "The future of mathematical cosmology"
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