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Scalable Atomic Arrays for Spin-Based Quantum Computers in Silicon

Advanced Materials, ISSN: 1521-4095, Vol: 36, Issue: 40, Page: e2405006
2024
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Most Recent Blog

New silicon-based arrays pave the way for scalable quantum computers

Researchers develop scalable atomic arrays for spin-based quantum computers in silicon, advancing the integration of quantum systems with semiconductor manufacturing.

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Article Description

Semiconductor spin qubits combine excellent quantum performance with the prospect of manufacturing quantum devices using industry-standard metal-oxide-semiconductor (MOS) processes. This applies also to ion-implanted donor spins, which further afford exceptional coherence times and large Hilbert space dimension in their nuclear spin. Here multiple strategies are demonstrated and integrated to manufacture scale-up donor-based quantum computers. PF molecule implants are used to triple the placement certainty compared to P ions, while attaining 99.99% confidence in detecting the implant. Similar confidence is retained by implanting heavier atoms such as Sb and Bi, which represent high-dimensional qudits for quantum information processing, while Sb molecules enable deterministic formation of closely-spaced qudits. The deterministic formation of regular arrays of donor atoms with 300 nm spacing is demonstrated, using step-and-repeat implantation through a nano aperture. These methods cover the full gamut of technological requirements for the construction of donor-based quantum computers in silicon.

Bibliographic Details

Jakob, Alexander M; Robson, Simon G; Firgau, Hannes R; Mourik, Vincent; Schmitt, Vivien; Holmes, Danielle; Posselt, Matthias; Mayes, Edwin L H; Spemann, Daniel; McCallum, Jeffrey C; Morello, Andrea; Jamieson, David N

Wiley

Materials Science; Engineering

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