[G-4] Quantum Computing II

[G-4-03] Single-Electron Transport Control for Qubit Initialization in Silicon Quantum Dot Arrays

〇Takeru - Utsugi¹, Noriyuki - Lee¹, Ryuta - Tsuchiya¹, Toshiyuki - Mine¹, Gou - Shinkai¹, Itaru - Yanagi¹, Yusuke - Kanno¹, Tomonori - Sekiguchi¹, Satoru - Akiyama¹, Takayasu - Norimatsu¹, Yusuke - Wachi¹, Raisei - Mizokuchi², Jun - Yoneda², Tetsuo - Kodera², Shinichi - Saito¹, Digh - Hisamoto¹, Hiroyuki - Mizuno¹ (1. Hitachi, Ltd. (Japan), 2. Tokyo Inst. of Tech. (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.G-4-03

We demonstrated a single-electron transport in a quantum dot (QD) array. We used the parallel gates in the array as a single electron pump (SEP) and synchronously operated the subsequent gates of the SEP as QD shutters, loading a single electron into each QD in the array. The SEP can operate at 100 MHz with the accuracy of 99% at 4 K. By controlling the timing of the shutter operation, the jitter representing electron transfer timing fluctuation is less than 10 ns, which is much shorter than the expected operation time of the silicon qubits. Therefore, the developed single-electron transport can be used for performing qubit initialization in a silicon-based quantum computer.