Majority Gate Based Design for Combinational Quantum Cellular Automata (QCA) Circuits

Quantum cellular automata (QCA) present an important nanotechnology paradigm to design digital logic. A cell consists of four quantum dots located at the corners of a square. This paper considers the design of complex logic blocks using a fundamental QCA device, which is a three input majority logic gate. Our technique uses the ´disjointing concept´, commonly used in the reliability literature. Our comparison with two existing approaches shows that the proposed method provides an efficient solution.