New non-perturbative de Sitter vacua in α?-complete cosmology

CARMEN A. NÚÑEZ; FACUNDO ROST

JOURNAL OF HIGH ENERGY PHYSICS

SPRINGER

Lugar: Berlin; Año: 2021 vol. 21

1126-6708

The α'-complete cosmology developed by Hohm and Zwiebach classifies the O(d, d; R) invariant theories involving metric, b-field and dilaton that only depend on time, to all orders in α'.Some of these theories feature non-perturbative isotropic de Sitter vacua in the string frame,generated by the infinite number of higher-derivatives of O(d, d; R) multiplets. Extending theisotropic ansatz, we construct stable and unstable non-perturbative de Sitter solutions in thestring and Einstein frames. The generalized equations of motion admit new solutions, including anisotropic d + 1-dimensional metrics and non-vanishing b-field. In particular, we finddS(n+1)×T(d−n) geometries with constant dilaton, and also metrics with bounded scale factors inthe spatial dimensions with non-trivial b-field. We discuss the stability and non-perturbativecharacter of the solutions, as well as possible applications.