• Dr.Mrs.Vrushali.A.Kailuke
• Rutuja Bhusari
• Shravya Somkuwar
• Twinkle Mishra
• Nandini Badole

The growing demand for compact, energy-efficient computing systems highlights the limitations of conventional CMOS circuits, which consume excessive power. Cellular Automata (QCA) offers a promising alternative by encoding information through electron arrangements in quantum dots, eliminating current-based switching. This enables the development of nanoscale logic circuits with low power consumption and reduced size. This review details the design and simulation of a 1-bit Arithmetic Logic Unit (ALU) using QCA technology. The ALU carries out arithmetic and logic operations using main QCA components like majority gates, inverters, wires, and multiplexers. Its single-layer, crossover-free design makes the layout simpler and avoids complex signal crossings. The circuit is built and tested in QCA Designer, and its performance is measured by cell count, area, latency, and energy use. The circuit is designed and simulated in QCA Designer, with performance evaluated by cell count, area, latency, and energy consumption. Results show that the proposed architecture is more compact and efficient than existing QCA-based ALUs. Its low complexity and energy requirements make it suitable for future nanoscale digital systems where area and energy efficiency are essential. These results confirm the potential of QCA technology as a viable alternative to CMOS for compact arithmetic and logic circuits.

Quantum-dot cellular automata,QCA,1-bit ALU,arithmetic unit,logic unit, majority gate, full adder,multiplexer, QCADesigner

"Area Efficient 1-BIT Arithmetic & Logical Unit using Quantum Dot Cellular Automata", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 10, page no.c807-c826, October-2026, Available :http://www.jetir.org/papers/JETIR2610281.pdf

"Area Efficient 1-BIT Arithmetic & Logical Unit using Quantum Dot Cellular Automata", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 10, page no. ppc807-c826, October-2026, Available at : http://www.jetir.org/papers/JETIR2610281.pdf