Novel Quantum-Dot Cellular Automata-Based Gate Designs for Efficient Reversible Computing

Mohsen Vahabi (), Ehsan Rahimi, Pavel Lyakhov, Ali Newaz Bahar, Khan A. Wahid and Akira Otsuki ()
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Mohsen Vahabi: Faculty of Electrical Engineering, Shahrood University of Technology, Shahrood, Semnan 316, Iran
Ehsan Rahimi: Faculty of Electrical Engineering, Shahrood University of Technology, Shahrood, Semnan 316, Iran
Pavel Lyakhov: Department of Mathematical Modeling, North-Caucasus Federal University, Stavropol 355017, Russia
Ali Newaz Bahar: Department of Information and Communication Technology (ICT), Mawlana Bhashani Science and Technology University, Tangail 1902, Bangladesh
Khan A. Wahid: Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK S7N5A9, Canada
Akira Otsuki: Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Diagonal Las Torres 2640, Peñalolén, Santiago 7941169, Chile

Sustainability, 2023, vol. 15, issue 3, 1-25

Abstract: Reversible logic enables ultra-low power circuit design and quantum computation. Quantum-dot Cellular Automata (QCA) is the most promising technology considered to implement reversible circuits, mainly due to the correspondence between features of reversible and QCA circuits. This work aims to push forward the state-of-the-art of the QCA-based reversible circuits implementation by proposing a novel QCA design of a reversible full adder\full subtractor (FA\FS). At first, we consider an efficient XOR-gate, and based on this, new QCA circuit layouts of Feynman, Toffoli, Peres, PQR, TR, RUG, URG, RQCA, and RQG are proposed. The efficient XOR gate significantly reduces the required clock phases and circuit area. As a result, all the proposed reversible circuits are efficient regarding cell count, delay, and circuit area. Finally, based on the presented reversible gates, a novel QCA design of a reversible full adder\full subtractor (FA\FS) is proposed. Compared to the state-of-the-art circuits, the proposed QCA design of FA\FS reversible circuit achieved up to 57% area savings, with 46% and 29% reduction in cell number and delay, respectively.

Keywords: reversible gates; Feynman gate; Toffoli gate; Peres gate; PQR gate; TR gate; RUG gate; URG gate; RQCA gate; RQG gates; reversible FA\FS (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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