Optimal of 1-bit Comparator design and Energy Estimation using Quantum Dot Cellular Automata

Performance of CMOS technology has been affected in nanosystems due to power dissipation, area, and reliability functionalities. A research initiative which investigates other possible systems with related capacities is QCA. In this paper, QCA nanotechnology was used to create a 1-bit comparator. These circuits are easy to create and do not require any crossovers. The proposed design is extremely efficient in terms of area, cell count, quantum cost and delay, which improves the performance in the range of 74.81% to 99.87%  in terms of quantum cost. As a result, proposed designs are often found in various digital logics that require a small amount of space and low power consumption

Quantum-dot Cellular Automata: Review Paper

Quantum-dot Cellular Automata (QCA) is one of the most important discoveries that will be the successful alternative for CMOS technology in the near future. An important feature of this technique, which has attracted the attention of many researchers, is that it is characterized by its low energy consumption, high speed and small size compared with CMOS.  Inverter and majority gate are the basic building blocks for QCA circuits where it can design the most logical circuit using these gates with help of QCA wire. Due to the lack of availability of review papers, this paper will be a destination for many people who are interested in the QCA field and to know how it works and why it had taken lots of attention recentl