[C-5] Quantum Computing III

[C-5-02] High-speed and low-variability operation of one-dimensional silicon-spin-qubit array employing buried nanomagnets

〇Shota Iizuka¹, Kimihiko Kato¹, Atsushi Yagishita¹, Hidehiro Asai¹, Tetsuya Ueda¹, Hiroshi Oka¹, Junichi Hattori¹, Tsutomu Ikegami¹, Koichi Fukuda¹, Takahiro Mori¹ (1. AIST (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.C-5-02

We investigated X-gate operation speed and variation tolerance in one-dimensionally integrated Si spin qubits employing the buried nanomagnet (BNM) technology. Our numerical simulations reveal that about 30 times faster X-gate operation is achievable thanks to a large slanting magnetic field generated by the BNM placed close to the spin qubits. Also, the proposed self-aligned fabrication process of the BNM can suppress fidelity variation caused by the fabrication process variation, supposing that the single wavelength microwaves control all qubits.