Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetries at Causal Boundaries in 2D and 3D Gravity   We study 2d and 3d gravity theories on spacetimes with causal (timelike or
null) codimension one boundaries while allowing for variations in the position
of the boundary. We construct the corresponding solution phase space and
specify boundary degrees freedom by analysing boundary (surface) charges
labelling them. We discuss Y and W freedoms and change of slicing in the
solution space. For D dimensional case we find D+1 surface charges, which are
generic functions over the causal boundary. We show that there exist solution
space slicings in which the charges are integrable. For the 3d case there
exists an integrable slicing where charge algebra takes the form of Heisenberg
\oplus\ {\cal A}_3 where {\cal A}_3 is two copies of Virasoro at Brown-Henneaux
central charge for AdS_3 gravity and BMS_3 for the 3d flat space gravity.

24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph