  Quantum-dot Cellular Automata (QCA) is one of the most important computing
technologies for the future and will be the alternative candidate for current
CMOS technology. QCA is attracting a lot of researchers due to many features
such as high speed, small size, and low power consumption. QCA has two main
building blocks (majority gate and inverter) used for design any Boolean
function. QCA also has an inherent capability that used to design many
important gates such as XOR and Multiplexer in optimal form without following
any Boolean function. This paper presents a novel design 2:1 QCA-Multiplexer in
two forms. The proposed design is very simple, highly efficient and can be used
to produce many logical functions. The proposed design output comes from the
inherent capabilities of quantum technology. New 4:1 QCA-Multiplexer has been
built using the proposed structure. The output waveforms showed the wonderful
performance of the proposed design in terms of the number of cells, area, and
latency.
