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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2022 Volume 115, Issue 12, Pages 786–792 (Mi jetpl6696)

This article is cited in 7 papers

CONDENSED MATTER

Phase logic based on $\pi$ Josephson junctions

A. A. Maksimovskayaab, V. I. Ruzhitskiycba, N. V. Klenovabc, S. V. Bakurskiyc, M. Yu. Kupriyanovc, I. I. Solovievacb

a Dukhov All-Russian Research Institute of Automatics, Moscow, 103030 Russia
b Faculty of Physics, Moscow State University, Moscow, 119991 Russia
c Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991 Russia

Abstract: The transition to Josephson digital circuits with the representation of information in the form of phase jumps of the superconducting order parameter on heterostructures promises a radical increase in the degree of integration while maintaining high speed and energy efficiency. However, it is not yet possible to manufacture reproducible bistable Josephson junctions, which are necessary for the functioning of the previously proposed basic units of the phase logic. To solve this problem, the concept of phase logic based on $\pi$ junctions is proposed and analyzed within the resistive model of Josephson heterostructures. The potential energy of such junctions has a single minimum, with a difference in the order parameters of the electrodes equal to $\pi$. It is demonstrated that the use of $\pi$ junctions allows one to implement the entire set of logic devices necessary for the operation of digital computing devices based on phase logic.

Received: 22.04.2022
Revised: 06.05.2022
Accepted: 07.05.2022

DOI: 10.31857/S1234567822120060


 English version:
Journal of Experimental and Theoretical Physics Letters, 2022, 115:12, 735–741


© Steklov Math. Inst. of RAS, 2024