Hitchhiker's guide to Courant algebroid relations
Abstract
Courant algebroids provide a useful mathematical tool (not only) in string theory. It is thus important to define and examine their morphisms. To some extent, this was done before using an analogue of canonical relations known from symplectic geometry. However, it turns out that applications in physics require a more general notion. We aim to provide a self-contained and detailed treatment of Courant algebroid relations and morphisms. A particular emphasis is placed on providing enough motivating examples. In particular, we show how Poisson-Lie T-duality and Kaluza-Klein reduction of supergravity can be interpreted as Courant algebroid relations compatible with generalized metrics (generalized isometries).
- Publication:
-
Journal of Geometry and Physics
- Pub Date:
- May 2020
- DOI:
- 10.1016/j.geomphys.2020.103635
- arXiv:
- arXiv:1910.05347
- Bibcode:
- 2020JGP...15103635V
- Keywords:
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- Courant algebroids;
- Involutive subbundles;
- Canonical relations;
- Symplectic category;
- Reduction of Courant algebroids;
- Poisson-Lie T-duality;
- Mathematics - Differential Geometry;
- High Energy Physics - Theory;
- Mathematics - Symplectic Geometry
- E-Print:
- Some minor things tweaked, typos corrected, references added