Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analogue gravity and radial fluid flows: The case of AdS and its
  deformations   An analogue model for the $\text{AdS}_2$ spacetime has been recently
introduced by Mosna, Pitelli and Richartz [Phys. Rev. D 94, 104065 (2016)] by
considering sound waves propagating on a fluid with an ill-defined velocity
profile at its source/sink. The wave propagation is then uniquely defined only
when one imposes an extra boundary condition at the source/sink (which
corresponds to the spatial infinity of $\text{AdS}_2$). Here we show that, once
this velocity profile is smoothed out at the source/sink, the need for extra
boundary conditions disappears. This, in turn, corresponds to deformations of
the $\text{AdS}_2$ spacetime near its spatial infinity. We also examine how
this regularization of the velocity profile picks up a specific boundary
condition for the idealized system, so that both models agree in the long
wavelength limit.

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The categories of this paper are: supr-con
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph