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The Scientific World Journal
Volume 2015, Article ID 705056, 9 pages
Research Article

A Customizable Quantum-Dot Cellular Automata Building Block for the Synthesis of Classical and Reversible Circuits

1Department of Mathematics and Computer Science, Faculty of Science, Alexandria University, Alexandria 21511, Egypt
2School of Computer Science, University of Birmingham, Birmingham B15 2TT, UK

Received 7 May 2015; Accepted 28 June 2015

Academic Editor: Jitendra Nath Roy

Copyright © 2015 Ahmed Moustafa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Quantum-dot cellular automata (QCA) are nanoscale digital logic constructs that use electrons in arrays of quantum dots to carry out binary operations. In this paper, a basic building block for QCA will be proposed. The proposed basic building block can be customized to implement classical gates, such as XOR and XNOR gates, and reversible gates, such as CNOT and Toffoli gates, with less cell count and/or better latency than other proposed designs.