To read this content please select one of the options below:

QCA with reversible arithmetic and logic unit for nanoelectronics applications

Gade Mary Swarna Latha (ECE, Koneru Lakshmaiah Education Foundation, Guntur, India) (ECE, Institute of Aeronautical Engineering, Hyderabad, India)
S. Rooban (ECE, Koneru Lakshmaiah Education Foundation, Guntur, India)

International Journal of Intelligent Computing and Cybernetics

ISSN: 1756-378X

Article publication date: 15 February 2022

Issue publication date: 7 March 2023




In this research work, brief quantum-dot cellular automata (QCA) concepts are discussed through arithmetic and logic units. This work is most useful for nanoelectronic applications, VLSI industry mainly depends on this type of fault-tolerant QCA based arithmetic logic unit (ALU) design. The ALU design is mainly depending on set instructions and rules; these are maintained through low-power ultra-functional tricks only possible with QCA-based reversible arithmetic and logic unit for nanoelectronics. The main objective of this investigation is to design an ultra-low power and ultra-high-speed ALU design with QCA technology. The following QCA method has been implemented through reversible logic.


QCA logic is the main and critical condition for realizing NANO-scale design that delivers considerably fast integrate module, effective performable computation and is less energy efficiency at the nano-scale (QCA). Processors need an ALU in order to process and calculate data. Fault-resistant ALU in QCA technology utilizing reverse logic is the primary objective of this study. There are now two sections, i.e. reversible ALU (RAU), logical (LAU) and arithmetical (RAU).


A reversible 2 × 1 multiplexer based on the Fredkin gate (FRG) was developed to allow users to choose between arithmetic and logical operations. QCA full adders are also implemented to improve arithmetic operations' performance. The ALU is built using reversible logic gates that are fault-tolerant.


In contrast to earlier research, the suggested reversible multilayered ALU with reversible QCA operation is imported. The 8- and 16-bit ALU, as well as logical unit functioning, is designed through fewer gates, constant inputs and outputs. This implementation is designed on the Mentor Graphics QCA tool and verifies all functionalities.



Funding: There is no funding support for this research work, this work is cannot affects the animals and environmental life cycle.


Latha, G.M.S. and Rooban, S. (2023), "QCA with reversible arithmetic and logic unit for nanoelectronics applications", International Journal of Intelligent Computing and Cybernetics, Vol. 16 No. 1, pp. 139-157.



Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

Related articles