A Three-Layer Full Adder/Subtractor Structure in Quantum-Dot Cellular Automata

Nowadays, quantum-dot cellular automata (QCA) is one of the paramount modern technologies for designing logical structures at the nano-scale. This technology is being used in molecular levels and it is based on QCA cells. High speed data transfer and low consumable power are the advantages of this technology. In this paper, we are designing and simulating a fulladder/subtractor with minimum number of cells and complexities in three layers. QCA designer software has been used to simulate the proposed design.