Superconducting Vortex Logic Antidots

TL;DR

This paper explores a superconducting vortex-based logic device where vortex positions encode binary states, analyzing its operational frequency and signal propagation characteristics through analytical and simulation methods.

Contribution

It introduces a novel vortex-based logic element using superconducting antidots and analyzes its frequency limits and signal propagation behavior.

Findings

Maximum operating frequency depends on antidot spacing and elongation.

Signal can propagate through antidot chains with exponential switching time distribution.

Finite temperature effects influence vortex signal transmission.

Abstract

We examine a building block for logic devices in which the positions of superconducting vortices in coupled elongated antidots provide the elementary logic states of 0 and 1. We show analytically and through simulation the maximum operating frequency of a pair of antidots as a function of antidot spacing and elongation. At finite temperatures, a signal can propagate through a series of identically shaped antidots with correctly chosen spacing, with an exponential distribution of switching times for the signal to move over by one antidot.