Quantum Gate Implementation of a Novel Reversible Half Adder and Subtractor Circuit

In this research work, the transistor level implementation and QCA implementation of TR reversible gate are performed and a comparison between both techniques on the ground of Area is executed. In the later section, a new-fangled design of the reversible adder and subtractor RSG gate is presented. This novel architecture can perform addition and subtraction operation simultaneously, which was never performed before using any of the existing reversible circuits. The proposed novel reversible gate, which uses 2X2 quantum gates and has a quantum cost of five, can be operated as Reversible Half Adder as well as Half Subtractor concurrently. The reversible gate proposed in this research will find numerous applicability in several DSP applications where half adder and half subtractor operates simultaneously.