Quantum-Dot Cellular Automata-Implementing Reversible Benchmarks

Quantum-Dot Cellular Automata is an emerging nanotechnology that assures low power consumption and high computational speed compared to CMOS architecture having fundamental problems like short channel effects, doping fluctuations, etc. QCA comprises of basic elements as Inverter (INV) and Majority Voter (MV). Reversible circuits and pipelining have evidently reduced the power consumption. In this paper we have proposed new fundamental basis (Feynman gate, Toffoli gate, etc.) for making complex pipelined reversible gates and implemented it to build Hamming code (order 3) and Fredkin gate. These proposed gates could be cascaded to obtain any complex circuit as suggested by Maslov. Multilayer approach is adopted for synthesis of the circuitry which is more sustainable than conventional single layer approach in terms of area, delay, cell count and logic synthesis. Coherent vector approximation has been carried out in QCADesigner 2.0.3.