What U Can Do: New Solutions and New Challenges Beyond Leading Order
arXiv:2603.29151 · doi:10.3390/universe12060167
Abstract
String theories naturally exhibit dualities that lead to hidden symmetries in the low-energy effective description, which have been used to great effect to generate supergravity solutions. We review recent progress in using hidden symmetries arising from T-duality to generate higher-derivative-corrected solutions, as well as the problems that arise from non-perturbative effects when extending this paradigm to hidden symmetries arising from U-duality.
14 pages, 3 figures; essay written for the Gravity Research Foundation 2026 Awards for Essays on Gravitation