Quantum dot Cellular Automata (QCA) is a promising technology and can emerge alternative to the existing CMOS based technology. This paper presents a novel reduced design of a full adder both in size and delay. Next a reduced area multilayered Arithmetic Logic Unit (ALU) is presented with significantly less delay. The designs have been verified and simulated using the QCA Designer tool. Keyword...

Absiract-Quantum-dot cellular automata (QCA) is an approach to computing which eliminates the need for transistors by representing binary digits as charge configurations rather than current levels. Coulomb interactions provide device-device coupling without current flow. Clocked control of the device, allows power gain, control of power dissipation, and pipelined computation. Molecular QCA uses...

This paper proposes a detailed design analysis of sequential circuits for quantum-dot cellular automata (QCA). This analysis encompasses flip-flop (FF) devices as well as circuits. Initially, a novel RS-type FF amenable to a QCA implementation is proposed. This FF extends a previous threshold-based configuration to QCA by taking into account the timing issues associated with the adiabatic switc...

Quantum cellular automata (QCA) is a new technology in nanometre scale (<18nm) to support nano technology. QCA is very effective in terms of high space density and power dissipation and will be playing a major role in the development of the Quantum computer with low power consumption and high speed. This paper describes the design and layout of a 2-bit ALU based on quantum-dot cellular automata...

Let $X$ be a vector space over a field $K$ of real or complex numbers. We will prove the superstability of the following Go{l}c{a}b-Schinzel type equation$$f(x+g(x)y)=f(x)f(y), x,yin X,$$where $f,g:Xrightarrow K$ are unknown functions (satisfying some assumptions). Then we generalize the superstability result for this equation with values in the field of complex numbers to the case of an arbitr...

Further downscaling of CMOS technology becomes challenging as it faces limitation of feature size reduction. Quantum-dot cellular automata (QCA), a potential alternative to CMOS, promises efficient digital design at nanoscale. Investigations on the reduction of QCA primitives (majority gates and inverters) for various adders are limited, and very few designs exist for reference. As a result, de...

Quantum-dot Cellular Automata (QCA) seek potential benefits over CMOS devices such as low power consumption, small dimensions, and high speed operation. Two prominent QCA concerns of wire crossing complexity and circuit robustness are addressed by developing a three-step Bilayer Logic Decomposition (BLD) methodology to design QCA-based logic circuits. The partitioning of QCA computing operation...

A novel technology the Quantum dot Cellular Automata (QCA) appears to be an alternate nano scale technology to provide the properties and functionalities of that have made CMOS successful over the past several decades. The experiment is carried out in QCA were demonstrated and realized the fundamental digital blocks. This paper introduce the designing a computationally useful and regular struct...

CMOS technology has achieved the device dimension in the nanometer range. Beyond this CMOS technology is the QCA (Quantum-dot Cellular Automata). Due to nanoscale defects may occur in this technology so in the consequences of it the faults will occur. This paper presents the defect analysis of QCA basic devices like Majority Voter (MV), inverter. The defect analysis and its effects on the outpu...