Experimental Demonstration of Quantum-Flux-Latch-Based Circuits

Author

Takeuchi, N. ; Ortlepp, Thomas ; Yamanashi, Y. ; Yoshikawa, N.

Author_Institution

Nat. Inst. of Inf. & Commun. Technol., Kobe, Japan

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

3

Abstract

We propose and discuss quantum-flux-latch (QFL) based circuits for adiabatic quantum-flux-parametron (AQFP) logic. The QFL-based XOR (QXOR) gate is a novel XOR gate. The circuit schematic of the QXOR is the same as that of a QFL, but QXORs operate on a different operation principle due to ac biasing. We designed and fabricated the QXOR and the half adder including a QXOR. We successfully demonstrated correct logic operations of these circuits at 4.2 K in the low-speed function test. Also, we estimated the energy dissipation of the QFL using a circuit simulator. The estimated energy dissipation was $sim$0.2 aJ/cycle.

Keywords

quantum gates; superconducting device testing; superconducting logic circuits; QFL-based XOR gate; QXOR gate; ac biasing; adiabatic quantum-flux-parametron logic; circuit simulator; energy dissipation; half adder; low-speed function test; quantum-flux-latch-based circuits; temperature 4.2 K; Adders; Clocks; Energy dissipation; Energy efficiency; Junctions; Logic gates; Superconducting logic circuits; AQFP; Adiabatic logic; QFL; XOR; adiabatic quantum-flux-parametron (AQFP); low-power; quantum-flux-latch (QFL);

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2374472

Filename

6967740