TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.19.2.044
TI  - Asymptotic T-duality in three dimensions
PY  - 2025/08/18
UR  - https://www.scipost.org/SciPostPhys.19.2.044
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 19
IS  - 2
SP  - 044
A1  - Detournay, Stéphane
AU  - Figueroa, José
AU  - Vilar López, Alejandro
AB  - In (super)gravity theories, T-duality relates solutions with an exact isometry which can have wildly different asymptotic behaviors: A well-known example is the duality between BTZ black holes and (non-extremal) three-dimensional black strings. Using this dual pair, we show how the knowledge of a phase space which includes one set of solutions (here, BTZ black holes embedded in the Brown-Henneaux phase space) allows to obtain a phase space for the dual set via an asymptotic notion of T-duality. The resulting asymptotic symmetry algebras can be very different. For our particular example, we find a large algebra of symmetries for the black string phase space which includes as subalgebras $\mathfrak{bms}_2$, $\mathfrak{bms}_3$, and a twisted warped conformal algebra. On the way, we show that a chiral half of the Brown-Henneaux boundary conditions are dual to the Compère-Song-Strominger ones.
ER  -

@Article{10.21468/SciPostPhys.19.2.044,
	title={{Asymptotic T-duality in three dimensions}},
	author={Stéphane Detournay and José Figueroa and Alejandro Vilar López},
	journal={SciPost Phys.},
	volume={19},
	pages={044},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.19.2.044},
	url={https://scipost.org/10.21468/SciPostPhys.19.2.044},
}