Efficient Design of Feynman and Toffoli Gate in Quantum dot Cellular Automata (QCA) with Energy Dissipation Analysis

Reversible computing in Quantum-dot Cellular Automata (QCA) is an expanding research field at ultra low power nano-computing area. Utilization of minimum power, rapid momentum, advanced switch in grate and scale arrangement of QCA assurances cost operative proficient logic outline with extreme intricacy at nano-scale. In this article two fundamental reversible logic gates, Feynman and Toffoli gate are presented. In contrast with earlier QCA layouts, the proposed designs are achieved with the lowest number of QCA cells, minimal extent and clock delay exclusive of any wire-crossing approaches. Moreover, the proposed circuits have been verified and simulated using QCADesigner and QCAPro has been employed to estimate the power dissipation.