A fault-tolerant addressable spin qubit in a natural silicon quantum dot

• DOI: 10.1126/sciadv.1600694
• Publication Date: 2016-08-13T03:08:54Z
• Authors: Kenta Takeda; Jun Kamioka; Tomohiro Otsuka; Jun Yoneda; Takashi Nakajima; Matthieu R. Delbecq; Shinichi Amaha; Giles Allison; Tetsuo Kodera; Shunri Oda; Seigo Tarucha
• Keywords: Silicon; Condensed Matter - Mesoscale and Nanoscale Physics; 13. Climate action; Quantum Dots; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; Nanotechnology; FOS: Physical sciences; Models, Theoretical; 7. Clean energy; 01 natural sciences; Research Articles; 3. Good health

Fault-tolerant quantum operation is a key requirement for the development of computing. This has been realized in various solid-state systems including isotopically purified silicon which provides nuclear spin free environment qubits, but not industry standard natural (unpurified) silicon. Here we demonstrate an addressable fault-tolerant qubit using double dot with micromagnet optimally designed fast control. optimized design allows us to achieve optimum Rabi oscillation quality factor Q = 140 at frequency 10 MHz range two orders magnitude higher than that achieved previous studies. leads fidelity 99.6 %, highest reported qubits and comparable obtained quantum-dot-based qubits. result can inspire contributions from industrial computing communities.