[22p-12C-1~18] KS.2 Quantum Information Engineering Group

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)

[22p-12C-9] Evaluation of Operating Speed of Low-Power Single-Flux-Quantum Circuits Fabricated Using 250 A/cm² Process toward Quantum Bit Control

〇Masamitsu Tanaka¹, Yoshihiro Kitagawa^2,3, Tetsuro Satoh^2,3, Tsuyoshi Yamamoto^2,3 (1.Nagoya Univ., 2.NEC, 3.AIST)

Keywords:

superconductor device,single flux quantum circuit,superconductor qubit

Superconductor single-flux-quantum (SFQ) circuits are promising for signal processing near superconductor qubits because they feature high-speed, low-power operation at cryogenic temperature. We are aiming to reduce power consumption further by lowering supply currents using the low critical current density process and by lowering the driving voltage. We report the evaluation of ring oscillators and shift-registers to examine the operating speed of the SFQ circuits using these techniques.