Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A solid-state NMR three-qubit homonuclear system for quantum information
  processing: control and characterization   A three-qubit 13C solid-state nuclear magnetic resonance (NMR) system for
quantum information processing, based on the malonic acid molecule, is used to
demonstrate high-fidelity universal quantum control via strongly-modulating
radio-frequency pulses. This control is achieved in the strong-coupling regime,
in which the timescales of selective qubit addressing and of two-qubit
interactions are comparable.

14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an