https://service.tib.eu/vdataset/openaire_12e2ba7a-baca-418a-aefb-ef4815eb158f Paul K. Townsend Not defined 2025 Paul K. Townsend 17/11/2025 17/11/2025 Dataset 0 kb {"The nineteenth-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.This article is part of the theme issue ‘The future of mathematical cosmology, volume 2’."}