Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin
  Exchange in a Double Quantum Dot   A crucial requirement for quantum information processing is the realization
of multiple-qubit quantum gates. Here, we demonstrate an electron spin based
all-electrical two-qubit gate consisting of single spin rotations and inter-dot
spin exchange in a double quantum dot. A partially entangled output state is
obtained by the application of the two-qubit gate to an initial, uncorrelated
state. We find that the degree of entanglement is controllable by the exchange
operation time. The approach represents a key step towards the realization of
universal multiple qubit gates.

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The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc