A novel presentation of reversible logic gate in Quantum-dot Cellular Automata (QCA)

In last few decades, low power processing and small scaling have been successfully achieved by conventional lithography-based VLSI technology. However, this trend confronts serious challenges due to fundamental physical limits of Complementary Metal-Oxide-Semiconductor (CMOS) technology such as ultra-thin gate oxides, short channel effects, doping fluctuations at nano-scale regimes. Quantum-dot Cellular Automata (QCA) technology has been extensively conceivable as one of the alternative, that gives not only the solution of CMOS technology at nano-scale, but also it offers a new method of computation and information transformation. This paper presents a novel representation of reversible gate in QCA. Those proposed circuit has a promising future in constructing of nano-scale low power consumption information processing system and can be stimulated higher digital applications in QCA.