Presentation Information
[ED7-02-INV]Ultra-Low-Power Electronics Using Adiabatic Superconductor Logic
*Naoki Takeuchi1 (1. Kobe University (Japan))
Keywords:
AQFP,energy-efficient,quantum computing,stochastic computing
Adiabatic quantum-flux-parametron (AQFP) [1,2] logic is an ultra-low-power superconductor logic
family that achieves extremely small power dissipation of ~10 pW per Josephson junction [3] owing
to adiabatic switching [4,5]. In addition, AQFP logic offers unique features such as low current drive,
high sensitivity, and stochastic operation, which have opened up a wide range of applications. In this
study, we report on the fundamentals and recent progress of AQFP logic. We first outline the operating
principle of AQFPs and describe methods for designing digital circuits with them. We then highlight
recent advances in key applications, including qubit controllers [6,7] and stochastic electronics [8].
Finally, we discuss future prospects for AQFP logic. This work was supported by JST FOREST (Grant
No. JPMJFR212B) and JSPS KAKENHI (Grant Nos. JP22H00220 and JP19H05615). The circuits
were fabricated at the Superconducting Quantum Circuit Fabrication Facility (Qufab) of AIST.
References
[1] N. Takeuchi, D. Ozawa, Y. Yamanashi, and N. Yoshikawa, An adiabatic quantum flux parametron as an ultra-lowpower
logic device, Supercond. Sci. Technol. 26, 035010 (2013).
[2] N. Takeuchi, T. Yamae, C. L. Ayala, H. Suzuki, and N. Yoshikawa, Adiabatic quantum-flux-parametron: A tutorial
review, IEICE Trans. Electron. E105.C, 251 (2022).
[3] N. Takeuchi, T. Yamae, C. L. Ayala, H. Suzuki, and N. Yoshikawa, An adiabatic superconductor 8-bit adder with
24kBT energy dissipation per junction, Applied Physics Letters 114, 042602 (2019).
[4] R. W. Keyes and R. Landauer, Minimal energy dissipation in logic, IBM J. Res. & Dev. 14, 152 (1970).
[5] K. K. Likharev, Classical and quantum limitations on energy consumption in computation, Int J Theor Phys 21, 311
(1982).
[6] N. Takeuchi, T. Yamae, W. Luo, F. Hirayama, T. Yamamoto, and N. Yoshikawa, Scalable flux controllers using
adiabatic superconductor logic for quantum processors, Phys. Rev. Research 5, 013145 (2023).
[7] N. Takeuchi, T. Yamae, T. Yamashita, T. Yamamoto, and N. Yoshikawa, Microwave-multiplexed qubit controller using
adiabatic superconductor logic, Npj Quantum Inf 10, 53 (2024).
[8] W. Luo, O. Chen, N. Yoshikawa, and N. Takeuchi, Sigmoid function generator using stochastic adiabatic
superconductor logic, Applied Physics Letters 122, 242602 (2023).
family that achieves extremely small power dissipation of ~10 pW per Josephson junction [3] owing
to adiabatic switching [4,5]. In addition, AQFP logic offers unique features such as low current drive,
high sensitivity, and stochastic operation, which have opened up a wide range of applications. In this
study, we report on the fundamentals and recent progress of AQFP logic. We first outline the operating
principle of AQFPs and describe methods for designing digital circuits with them. We then highlight
recent advances in key applications, including qubit controllers [6,7] and stochastic electronics [8].
Finally, we discuss future prospects for AQFP logic. This work was supported by JST FOREST (Grant
No. JPMJFR212B) and JSPS KAKENHI (Grant Nos. JP22H00220 and JP19H05615). The circuits
were fabricated at the Superconducting Quantum Circuit Fabrication Facility (Qufab) of AIST.
References
[1] N. Takeuchi, D. Ozawa, Y. Yamanashi, and N. Yoshikawa, An adiabatic quantum flux parametron as an ultra-lowpower
logic device, Supercond. Sci. Technol. 26, 035010 (2013).
[2] N. Takeuchi, T. Yamae, C. L. Ayala, H. Suzuki, and N. Yoshikawa, Adiabatic quantum-flux-parametron: A tutorial
review, IEICE Trans. Electron. E105.C, 251 (2022).
[3] N. Takeuchi, T. Yamae, C. L. Ayala, H. Suzuki, and N. Yoshikawa, An adiabatic superconductor 8-bit adder with
24kBT energy dissipation per junction, Applied Physics Letters 114, 042602 (2019).
[4] R. W. Keyes and R. Landauer, Minimal energy dissipation in logic, IBM J. Res. & Dev. 14, 152 (1970).
[5] K. K. Likharev, Classical and quantum limitations on energy consumption in computation, Int J Theor Phys 21, 311
(1982).
[6] N. Takeuchi, T. Yamae, W. Luo, F. Hirayama, T. Yamamoto, and N. Yoshikawa, Scalable flux controllers using
adiabatic superconductor logic for quantum processors, Phys. Rev. Research 5, 013145 (2023).
[7] N. Takeuchi, T. Yamae, T. Yamashita, T. Yamamoto, and N. Yoshikawa, Microwave-multiplexed qubit controller using
adiabatic superconductor logic, Npj Quantum Inf 10, 53 (2024).
[8] W. Luo, O. Chen, N. Yoshikawa, and N. Takeuchi, Sigmoid function generator using stochastic adiabatic
superconductor logic, Applied Physics Letters 122, 242602 (2023).