Novel high-performance QCA Fredkin gate and designing scalable QCA binary to gray and vice versa

Abstract In the design of digital logic circuits, QCA technology is an excellent alternative to CMOS technology. Its advantages over include low power consumption, fast circuit switching, and nanoscale design. Circuits that convert data between different formats are code converters. Code converters have essential role in high-performance computing signal processing. this paper, first, we proposed a novel structure for quantum reversible Fredkin gate. Second, 4-bit 8-bit binary-to-gray converter vice versa. For second proposal, both irreversible structures suggested. The scalable up N bits. To change conversion type from B2G G2B, use 2:1 multiplexer. applied as multiplexers. suggested designs simulated using QCADesigner tool. Then calculated figures merit, including cell counts, occupied areas, clock zones. Finally, compare existing research. Our approach first quantum-dot cellular automata perform G2B single circuit. scalable. Specifications reported.