Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum simulation of particle creation in curved space-time   Conversion of vacuum fluctuations into real particles was first predicted by
L. Parker considering an expanding universe, followed in S. Hawking's work on
black hole radiation. Since their experimental observation is challenging,
analogue systems have gained attention in the verification of this concept.
Here we propose an experimental set-up consisting of two adjacent piezoelectric
semiconducting layers, one of them carrying dynamic quantum dots (DQDs), and
the other being p-doped with an attached gate on top, which introduces a
space-dependent layer conductivity. The propagation of surface acoustic waves
(SAWs) on the latter layer is governed by a wave equation with an effective
metric. In the frame of the DQDs, this space- and time-dependent metric
possesses a sonic horizon for SAWs and resembles that of a two dimensional
non-rotating and uncharged black hole to some extent. The non-thermal steady
state of the DQD spin indicates particle creation in form of piezophonons.

24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg