Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical Black-hole Analog Created by Topological Phase Transition with a
  Long-lived Horizon   Hawking radiation, a manifestation of quantum field theory in curved
spacetime, has stimulated extensive theoretical and experimental studies of
various black-hole (BH) analogs. However, an undisputed confirmation of Hawking
radiation remains elusive. One challenge is BH analog structures with
long-lived horizons are difficult to achieve. Here, we theoretically
demonstrate a new type of optical BH analog based on light cone evolution
associated with topological phase transition of Dirac cones. The transition
from a type-II to type-I Dirac/Weyl cone creates an analogous curved spacetime
that crosses a type-III Dirac/Weyl cone, which affords a stationary
configuration of long-lived event horizon. Photons tunneling through the
horizon emit a spectrum of Hawking radiation. As an example, we design a
laboratory version in an inhomogeneous two-dimensional graphyne-like
topological photonic lattice with a Hawking temperature of 0.14 mK.
Understanding Hawking-like radiation in this unique topological BH is not only
of fundamental interest in its own right but may also provide new hints to
gravitational physics.

6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph