Programmable Crossbar Quantum-dot Cellular Automata Circuits

TL;DR

This paper introduces programmable crossbar QCA circuits that enable systematic design automation, allowing for flexible implementation of Boolean functions in nanoelectronic circuits.

Contribution

It presents a novel crossbar architecture for programmable QCA circuits, advancing the potential for automated design of large-scale QCA nanoelectronics.

Findings

Designed and simulated QCA circuits demonstrating area efficiency

Circuits proved to be stable and reliable

Opened pathways for full design automation of QCA circuits

Abstract

Quantum-dot fabrication and characterization is a well-established technology, which is used in photonics, quantum optics and nanoelectronics. Four quantum-dots placed at the corners of a square form a unit cell, which can hold a bit of information and serve as a basis for Quantum-dot Cellular Automata (QCA) nanoelectronic circuits. Although several basic QCA circuits have been designed, fabricated and tested, proving that quantum-dots can form functional, fast and low-power nanoelectornic circuits, QCA nanoelectronics still remain at its infancy. One of the reasons for this is the lack of design automation tools, which will facilitate the systematic design of large QCA circuits that contemporary applications demand. Here we present novel, programmable QCA circuits, which are based on crossbar architecture. These circuits can be programmed to implement any Boolean function in analogy to CMOS FPGAs and open the road that will lead to full design automation of QCA nanoelectronic circuits. Using this architecture we designed and simulated QCA circuits that proved to be area efficient, stable and reliable.