Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal gate-set for trapped-ion qubits using a narrow linewidth diode
  laser   We report on the implementation of a high fidelity universal gate-set on
optical qubits based on trapped $^{88}$Sr$^+$ ions for the purpose of quantum
information processing. All coherent operations were performed using a narrow
linewidth diode laser. We employed a master-slave configuration for the laser,
where an ultra low expansion glass (ULE) Fabry-Perot cavity is used as a stable
reference as well as a spectral filter. We characterized the laser spectrum
using the ions with a modified Ramsey sequence which eliminated the affect of
the magnetic field noise. We demonstrated high fidelity single qubit gates with
individual addressing, based on inhomogeneous micromotion, on a two-ion chain
as well as the M{\o}lmer-S{\o}rensen two-qubit entangling gate.

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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: econ
24
The categories of this paper are: dg-ga