We can overcome the CMOS scaling problems with emerging Nanotechnology. In Nanotechnology the basic building block of digital design is QCA. The problem in design of decimal adders on Quantum dot cellular automata with reduction of QCA primitives is very limited. In this paper we present a BCD adder with less number of QCA primitives and it is compared with existing BCD adder designs. Our propo...

Quantum-dot Cellular Automata (QCA) as a nanoscale transistor-less device technology offers distinguishing advantages over the limitations of CMOS circuits. While more than 2 decades of design progress have been achieved with QCA, a comprehensive composition approach for the layout design in this technology is needed. In this study, the Priority-Phased Decomposition-Driven (PPDD) QCA logic desi...

We present the experimental demonstration of a basic cell of quantum-dot cellular automata (QCA), a transistorless computation paradigm which addresses the issues of device density and interconnection. The device presented is a six-dot quantum-dot cellular system consisting of a four-dot QCA cell and two electrometer dots. The system is fabricated using metal dots which are connected by capacit...

A Quantum Cellular Automaton (QCA) is a nanotechnology which is an attractive alternative for transistor based technologies in the near future. A new seven input majority gate in quantum dot cellular automata is proposed in this paper. The basic elements in QCA are majority and inverter gates, therefore using a majority gate with more inputs in QCA circuit will cause reduction in cell count, la...

We establish a method for exploring the dynamics of molecular quantum-dot cellular automata QCA devices by hierarchically combining the techniques of quantum chemistry with the nonequilibrium time-dependent coherence vector formalism. Single QCA molecules are characterized using ab initio quantum chemistry methods. We show how to construct a simple model Hamiltonian for each QCA cell based on p...

<p>The limitations related to CMOS such as power consumption and parasitic capacitance lead scientists search for new technologies. Quantum-dot cellular automata (QCA) is a alternative technology that uses charges instead of voltage level binary representation. In QCA, many metrics are used circuit differentiation delay, complexity area. this work, simple block 2:1 QCA-Multiplexer propose...

In this paper, we propose a novel Quantum-dot Cellular Automata (QCA) based Programmable Switch Matrix which can be used as a routing element for future nano Field Programmable Gate Arrays (FPGAs). QCA technology is an emerging technology based on encoding binary information in charge configuration within quantum dot cells. In FPGAs, the Programmable Switch Matrix (PSM) is the interconnection c...

Most of Exclusive-OR(XOR) logic gates on quantum-dot cellular automata(QCA) is based on configuration of 2-input, and they are hardly to be scalable and exists unbearable noise because they are only focused on decrease of latency and space. In this paper, we propose how to make a scalable logic using a wire crossing technique, and give examples of two expanded XOR gate using typical logic gates...

We investigate the benefit of using ESOP minimization in the synthesis of quantum-dot cellular automata (QCA). We determine the size and delay of multi-input XOR and AND/OR gates when implemented in using 3-input majority gates that are easily realized in QCA, and use our results in our QCAexor estimator tool. We found that most benchmarks have at least one output that can be better minimized u...