Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Trapped-ion quantum logic with global radiation fields   Trapped ions are a promising tool for building a large-scale quantum
computer. However, the number of required radiation fields for the realisation
of quantum gates in any proposed ion-based architecture scales with the number
of ions within the quantum computer, posing a major obstacle when imagining a
device with millions of ions. Here we present a fundamentally different concept
for trapped-ion quantum computing where this detrimental scaling entirely
vanishes, replacing millions of radiation fields with only a handful of fields.
The method is based on individually controlled voltages applied to each logic
gate location to facilitate the actual gate operation analogous to a
traditional transistor architecture within a classical computer processor. To
demonstrate the key principle of this approach we implement a versatile quantum
gate method based on long-wavelength radiation and use this method to generate
a maximally entangled state of two quantum engineered clock-qubits with
fidelity 0.985(12). This quantum gate also constitutes a simple-to-implement
tool for quantum metrology, sensing and simulation.

15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th