A Cost Efficient Reversible QCA Multiplexer for Low Power Applications

Low-power architectures are increasingly significant across a spectrum of applications, ranging from the Internet of Things (IoT) and Quantum Computing. The Quantum dot cellular automata (QCA) is regarded as a promising platform for implementing digital circuits at the nanoscale owing to its less power consumption (PC) and great performance. The proposed design is a 4xl multiplexer (MUX) using QCA technology. The MUX serves as a fundamental building block in digital systems, enabling the selection of one out of four input signals based on a control signal. Our proposed design leverages the unique properties of QCA, such as Coulombic interactions among quantum dots, to realize compact and efficient multiplexing functionality. We present a Controlled Operational Gate(Cog)with detailed design methodology, layout optimization techniques, and performance analysis of the proposed 4xl QCA 4xl MUX using COG. Simulation results demonstrate the feasibility and effectiveness of our design in terms of area efficiency, latency, and quantum cost leading to low PC. The proposed 4xl QCA MUX holds promise for realizing complex digital systems with improved performance and energy efficiency, paving the way for advanced nanoscale computing applications.