Thurston Geometries from Eleven Dimensions
J. Gegenberg, S. Vaidya, J.F. Vazquez-Poritz

TL;DR
This paper explores how all Thurston geometries can be derived from higher-dimensional theories using compactifications and T-duality, revealing connections between three-dimensional geometries and M-theory.
Contribution
It demonstrates that Thurston geometries can be obtained from higher-dimensional theories with scalar fields, using T-duality to relate different geometries within an M-theoretic framework.
Findings
Most Thurston geometries are related via T-duality in M-theory.
Three geometries are of the form N_2 x S^1, with N_2 of constant curvature.
Sol geometry is an exception, arising from D3-brane reduction in a B-field background.
Abstract
In three dimensions, a `master theory' for all Thurston geometries requires imaginary flux. However, these geometries can be obtained from physical three-dimensional theories with various additional scalar fields, which can be interpreted as moduli in various compactifications of a higher-dimensional `master theory'. Three Thurston geometries are of the form N_2 x S^1, where N_2 denotes a two-dimensional Riemannian space of constant curvature. This enables us to twist these spaces, via T-duality, into other Thurston geometries as a U(1) bundle over N_2. In this way, Hopf T-duality relates all but one of the geometries in the higher-dimensional M-theoretic framework. The exception is the `Sol geometry,' which results from the dimensional reduction of the decoupling limit of the D3-brane in a background B-field.
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