Feasibility study of logic circuits with a spin wave bus

Abstract

We present a feasibility study of logic circuits utilizing spin waves for informationtransmission and processing. As an alternative approach to the transistor-basedarchitecture, logic circuits with a spin wave bus do not use charge as an information carrier.In this work we describe the general concept of logic circuits with a spin wave bus andillustrate its performance by numerical simulations based on available experimental data.Theoretical estimates and results of numerical simulations on signal attenuation,signal phase velocity, and the minimum spin wave energy required per bit in thespin bus are obtained. The transport parameters are compared with ones forconventional electronic transmission lines. The spin wave bus is not intended tosubstitute traditional metal interconnects since it has higher signal attenuationand lower signal propagation speed. The potential value of a spin wave bus is,however, an interface between electronic circuits and integrated spintronics circuits.The logic circuits with a spin wave bus allow us to provide wireless read-in andread-out.