Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Silicon quantum processor with robust long-distance qubit couplings   Practical quantum computers require the construction of a large network of
highly coherent qubits, interconnected in a design robust against errors. Donor
spins in silicon provide state-of-the-art coherence and quantum gate
fidelities, in a physical platform adapted from industrial semiconductor
processing. Here we present a scalable design for a silicon quantum processor
that does not require precise donor placement and allows hundreds of nanometers
inter-qubit distances, therefore facilitating fabrication using current
technology. All qubit operations are performed via electrical means on the
electron-nuclear spin states of a phosphorus donor. Single-qubit gates use low
power electric drive at microwave frequencies, while fast two-qubit gates
exploit electric dipole-dipole interactions. Microwave resonators allow for
millimeter-distance entanglement and interfacing with photonic links. Sweet
spots protect the qubits from charge noise up to second order, implying that
all operations can be performed with error rates below quantum error correction
thresholds, even without any active noise cancellation technique.

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The categories of this paper are: physics
27
The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess