Effect of asymmetry of 0-0-π SQUID on Half Flux Quantum circuits

Toranosuke Nakayama; Hiroki Hori; Yuto Takeshita; Feng Li; Masamitsu Tanaka; Akira Fujimaki

Presentation information

Oral presentation

11 Superconductivity » 11.5 Junction and circuit fabrication process, digital applications

[16p-D215-1~16] 11.5 Junction and circuit fabrication process, digital applications

Thu. Mar 16, 2023 1:30 PM - 6:00 PM D215 (Building No. 11)

Yoshinao Mizugaki(UEC), Yuki Yamanashi(Yokohama Natl. Univ.), Naoki Takeuchi(AIST)

5:30 PM - 5:45 PM

[16p-D215-15] Effect of asymmetry of 0-0-π SQUID on Half Flux Quantum circuits

〇Toranosuke Nakayama¹, Hiroki Hori¹, Yuto Takeshita¹, Feng Li¹, Masamitsu Tanaka¹, Akira Fujimaki¹ (1.Nagoya Univ.)

Keywords:superconducting digital circuit

Half-flux quantum circuits (HFQ circuits) use a π junction with a large critical current value as an unswitchable phase shifter and a 0-0-π SQUID as a switch element. The 0-0-π SQUID's apparent critical current value is lowered by the rightward or leftward circulating current that is spontaneously generated inside the 0-0-π SQUID depending on the quantization conditions. This allows for ultra-low power operation approaching thermal noise. In this study, the effect of 0-0-π SQUID asymmetry on HFQ circuits is investigated by simulating HFQ-JTL.