Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adding momentum to D1-D5 system   We construct the first example of asymptotically flat solution which carries
three charges (D1,D5 and momentum) and which is completely regular everywhere.
The construction utilizes the relation between gravity solutions and spectral
flow in the dual CFT. We show that the solution has the right properties to
describe one of the microscopic states which are responsible for the entropy of
the black hole with three charges.

8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph