Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parallel Gate Operations Fidelity in a Linear Array of Flip-Flop Qubits   Quantum computers based on silicon are promising candidates for long term
universal quantum computation due to the long coherence times of electron and
nuclear spin states. Furthermore, the continuous progress of micro- and nano-
electronics, also related to the scaling of Metal-Oxide-Semiconductor (MOS)
systems, makes possible to control the displacement of single dopants thus
suggesting their exploitation as qubit holders. Flip-flop qubit is a donor
based qubit (DQ) where interactions between qubits are achievable for distance
up to several hundred nanometers. In this work, a linear array of flip-flop
qubits is considered and the unwanted mutual qubit interactions due to the
simultaneous application of two one-qubit and two two-qubit gates are included
in the quantum gate simulations. In particular, by studying the parallel
execution of couples of one-qubit gates, namely Rz(-pi/2) and Rx(-pi/2), and of
couples of two-qubit gate, i.e. \sqrt{iSWAP}, a safe inter-qubit distance is
found where unwanted qubit interactions are negligible thus leading to parallel
gates fidelity up to 99.9%.

14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: eess