Design and simulation of a reversible ALU by using QCA cells with the aim of improving evaluation parameters

One of the most promising solutions for replacing present technologies is Quantum Cellular Automata (QCA) technology. Considering its nature, this technology has very low energy losses. On the other hand, designing circuits that are without waste of information or reversible can be useful for decreasing energy losses. The arithmetic logic unit (ALU) is recognized as the basis of processor systems. In this paper, a reversible ALU is proposed along with its implementation and simulation QCA cells that benefit from a new reversible gate that we call NHG (Naghibzadeh-Hoshmand Gate). The proposed NHG gate has better performance in terms of cost and delay when compared with similar gates. Thus, the ALU shows acceptable improvement in measures used to evaluate reversible circuits and circuits implemented with QCA cells when compared with previous works.