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Hill CD, Peretz E, Hile SJ, et al. A surface code quantum computer in silicon. Sci Adv. 2015;1(9):e1500707doi: 10.1126/sciadv.1500707.
Hill, C. D., Peretz, E., Hile, S. J., House, M. G., Fuechsle, M., Rogge, S., Simmons, M. Y., & Hollenberg, L. C. (2015). A surface code quantum computer in silicon. Science advances, 1(9), e1500707. https://doi.org/10.1126/sciadv.1500707
Hill, Charles D, et al. "A surface code quantum computer in silicon." Science advances vol. 1,9 (2015): e1500707. doi: https://doi.org/10.1126/sciadv.1500707
Hill CD, Peretz E, Hile SJ, House MG, Fuechsle M, Rogge S, Simmons MY, Hollenberg LC. A surface code quantum computer in silicon. Sci Adv. 2015 Oct 30;1(9):e1500707. doi: 10.1126/sciadv.1500707. eCollection 2015 Oct. PMID: 26601310; PMCID: PMC4646824.
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Sci Adv. 2015 Oct 30;1(9):e1500707. doi: 10.1126/sciadv.1500707. eCollection 2015 Oct.

A surface code quantum computer in silicon.

Science advances

Charles D Hill, Eldad Peretz, Samuel J Hile, Matthew G House, Martin Fuechsle, Sven Rogge, Michelle Y Simmons, Lloyd C L Hollenberg

Affiliations

  1. Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Victoria 3010, Australia.
  2. Centre for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia.

PMID: 26601310 PMCID: PMC4646824 DOI: 10.1126/sciadv.1500707

Abstract

The exceptionally long quantum coherence times of phosphorus donor nuclear spin qubits in silicon, coupled with the proven scalability of silicon-based nano-electronics, make them attractive candidates for large-scale quantum computing. However, the high threshold of topological quantum error correction can only be captured in a two-dimensional array of qubits operating synchronously and in parallel-posing formidable fabrication and control challenges. We present an architecture that addresses these problems through a novel shared-control paradigm that is particularly suited to the natural uniformity of the phosphorus donor nuclear spin qubit states and electronic confinement. The architecture comprises a two-dimensional lattice of donor qubits sandwiched between two vertically separated control layers forming a mutually perpendicular crisscross gate array. Shared-control lines facilitate loading/unloading of single electrons to specific donors, thereby activating multiple qubits in parallel across the array on which the required operations for surface code quantum error correction are carried out by global spin control. The complexities of independent qubit control, wave function engineering, and ad hoc quantum interconnects are explicitly avoided. With many of the basic elements of fabrication and control based on demonstrated techniques and with simulated quantum operation below the surface code error threshold, the architecture represents a new pathway for large-scale quantum information processing in silicon and potentially in other qubit systems where uniformity can be exploited.

Keywords: Donors in silicon; Silicon quantum computing; Spin qubits

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