Optimization of Adiabatic Superconducting Logic Cells by Using π Josephson Junctions

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Abstract

Adiabatic superconducting logic circuits can ensure the practical implementation of operations with the energy dissipation below the Landauer limit. However, applications of the existing solutions are limited because of two contradictory requirements of a high energy efficiency and a sufficiently fast response of devices. Josephson junctions with a negative critical current (π junctions) allow one to obtain a certain form of the potential energy of superconducting circuits and, as a result, a practically required degree of control of dynamic processes in the proposed reversible logic cells. The features of the current transport and balance of Josephson phases in circuits with π junctions make it possible to improve the coupling between the parts of a reversible computer by a factor more than 2. At the same time, the continuous evolution of the state is ensured at higher critical currents and higher characteristic voltages of the main Josephson junctions of adiabatic superconducting logic cells, which allows an increase in the response rate.

About the authors

G. S. Khismatullin

Skobeltsyn Institute of Nuclear Physics, Moscow State University; Russian Quantum Center

Email: nvklenov@mail.ru
Moscow, 119991 Russia;Skolkovo, Moscow, 121205 Russia

N. V. Klenov

Faculty of Physics, Moscow State University;National University of Science and Technology MISiS

Email: nvklenov@mail.ru
Moscow, 119991 Russia;Moscow, 119049 Russia

I. I. Solov'ev

Faculty of Physics, Moscow State University;National University of Science and Technology MISiS

Author for correspondence.
Email: nvklenov@mail.ru
Moscow, 119991 Russia;Moscow, 119049 Russia

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