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Nat Commun. 2017 Dec 15;8(1):1766. doi: 10.1038/s41467-017-01905-6.

Silicon CMOS architecture for a spin-based quantum computer.

Author information

1
Qutech and Kavli Institute of Nanoscience, TU Delft, 2600, GA Delft, The Netherlands. M.Veldhorst@tudelft.nl.
2
Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, 2052, Australia. M.Veldhorst@tudelft.nl.
3
Qutech and Kavli Institute of Nanoscience, TU Delft, 2600, GA Delft, The Netherlands.
4
Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, 2052, Australia.
5
Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, 2052, Australia. A.Dzurak@unsw.edu.au.

Abstract

Recent advances in quantum error correction codes for fault-tolerant quantum computing and physical realizations of high-fidelity qubits in multiple platforms give promise for the construction of a quantum computer based on millions of interacting qubits. However, the classical-quantum interface remains a nascent field of exploration. Here, we propose an architecture for a silicon-based quantum computer processor based on complementary metal-oxide-semiconductor (CMOS) technology. We show how a transistor-based control circuit together with charge-storage electrodes can be used to operate a dense and scalable two-dimensional qubit system. The qubits are defined by the spin state of a single electron confined in quantum dots, coupled via exchange interactions, controlled using a microwave cavity, and measured via gate-based dispersive readout. We implement a spin qubit surface code, showing the prospects for universal quantum computation. We discuss the challenges and focus areas that need to be addressed, providing a path for large-scale quantum computing.

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