Energy-Efficient High Speed Quantum-Dot Cellular Automata (QCA) based Reversible Full Adders for Low-Power Digital Computing Applications

QCA is a promising nanotechnology that reduces transistor-based circuitry to provide notable speed and energy efficiency benefits. To further enhance performance and lower power consumption, QCA is integrated with reversible computing which is known to reduce power dissipation. This paper presents the design and analysis of high-speed, energy-efficient reversible full adders using quantum dot cellular automata (QCA) technology for low-power digital computing applications. The goal of the proposed design is to create high-speed low-power full adders by optimizing reversible logic gates like the Fredkin, Toffoli and Peres gates. The design achieves notable reductions in power dissipation compared to traditional CMOS-based designs by utilizing the special ability of QCA technology to operate with minimal switching energy. Today, creating complete stacking circuits that meet the growing demands is one of the biggest challenges to VLSI architects. The suggested QCA-based reversible full adders which can be used in emerging low-power high-speed digital applications like mobile computing cryptography and Internet of Things devices show improved performance in terms of energy efficiency,speed, latency, and fault tolerance through thorough simulation and analysis. According to experimental results, the new design provides improved integration and scalability for upcoming quantum-based architectures, opening the door for effective long-lasting digital systems.