Simulation of highly idealized, atomic scale MQCA logic circuits

TL;DR

This paper models atomic-scale MQCA logic circuits using spin dynamics, demonstrating potential for lower power and comparable speed to CMOS, with idealized assumptions highlighting fundamental capabilities.

Contribution

It introduces a simulation framework for atomic-scale MQCA logic circuits and compares their performance with electronic transistors under idealized conditions.

Findings

Switching speed comparable to CMOS

Lower power dissipation possible

Size-speed trade-off demonstrated

Abstract

Spintronics logic devices based on majority gates formed by atomic-level arrangements of spins in the crystal lattice is considered. The dynamics of switching is modeled by time-dependent solution of the density-matrix equation with relaxation. The devices are shown to satisfy requirements for logic. Switching speed and dissipated energy are calculated and compared with electronic transistors. The simulations show that for the highly idealized case assumed here, it is possible to trade off size for speed and achieve lower power operation than ultimately scaled CMOS devices.