A Novel Bit-slice Design of Quantum-dot Cellular Automata Based Arithmetic Logic Unit

Quantum-dot Cellular Automata (QCA) is one of the alternative technologies to conventional CMOS. As CMOS technology continues its constant shrink, the scale down problems become more predominant and unavoidable. Computing with quantum dots remains a viable goal in nanotechnology research and development. Quantum-dot Cellular Automata (QCA) is a paradigm for low-power, high-speed and highly dense computing that could be realized in a variety of material systems. This paper reviews the basic paradigm of QCA and presents a design and layout of an 8-bit Arithmetic Logic Unit (ALU) based on QCA. In the present work the divide and conquer method is used to develop the design. The design problem was first considered for 1-bit quantities and then these solutions were combined in designing an 8-bit ALU.

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