Efficient Multiplexer Design and Analysis using Quantum dot Cellular Automata

Quantum dot Cellular Automata are future representations of quantum reckoning, which is developed in resemblance to the predictable models of cellular automata familiarized by Von Neumann. Quantum dot Cellular Automata (QCA) technology is striking for its low power intake, fast speed and small dimension and so it is a favorable alternative to CMOS technology. Multiplexer is an important building block of digital circuits and very useful part in most frequently used logical circuits. In this paper, a competent design of 2:1 MUX has been proposed which is smallest ever. The comparison between different existing multiplexers with the proposed one has been done successfully in this paper. There are four fabrication methodologies of QCA cell, viz. Molecular, semiconductor, magnetic, and metallic. Among all types of QCA cells, metallic one is not suitable at normal temperature. Therefore, temperature plays a key role in QCA circuit. This article includes the effect of temperature on polarization of the proposed multiplexer. Proposed design has been verified using QCA designer tool.