Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cryogenic Trapped-Ion System for Large Scale Quantum Simulation   We present a cryogenic ion trapping system designed for large scale quantum
simulation of spin models. Our apparatus is based on a segmented-blade ion trap
enclosed in a 4 K cryostat, which enables us to routinely trap over 100
$^{171}$Yb$^+$ ions in a linear configuration for hours due to a low background
gas pressure from differential cryo-pumping. We characterize the cryogenic
vacuum by using trapped ion crystals as a pressure gauge, measuring both
inelastic and elastic collision rates with the molecular background gas. We
demonstrate nearly equidistant ion spacing for chains of up to 44 ions using
anharmonic axial potentials. This reliable production and lifetime enhancement
of large linear ion chains will enable quantum simulation of spin models that
are intractable with classical computer modelling.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th