In this article we present an extended quantum-dot cellular automaton (QCA) cell. The extension is mainly focused on the enlargement of the range of possible states of a single QCA cell. In a QCA cell the electrons, owing to electrostatic repulsion, align along one of the two diagonal configurations that correspond to their maximal spatial separation. This gives the QCA cell the ability to enco...

Quantum cellular automata (QCA) is expected to provide highly dense nanotechnology implementations of logic. However, unlike the CMOS technology, the designs in QCA are constrained by the limited number of basic gate structures. This paper describes an important new basic building block, a five input majority gate (MAJ5) in QCA technology. Many new functions can be directly implemented in a sin...

According to the well-known prediction made by Gordon Moore forty years ago, the increase in the number of transistors per square inch of integrated circuits doubles every 18 months. With this pace of miniaturisation it is to be expected that in the next five to ten years the integration will be at the nanometer scale [1]. Due to this fact, many researchers have focused on this problem. In the ...

Quantum-dot cellular automaton at this moment works properly at very low temperature region. How to avoid or increase the low temperature limit is investigated.

Recent experiments have demonstrated a working cell suitable for implementing the quantum-dot cellular automata ~QCA! paradigm. These experiments have been performed using metal-island clusters. The most promising approach to QCA operation involves quasiadiabatically switching the cells. This has been analyzed extensively in gated semiconductor cells. Here we present a metal-island cell structu...

The present manuscript deals with the realization of Processing In-memory (PIM) computing architecture using Quantum Dot Cellular Automata (QCA) and Akers array. The PIM computing architecture becomes popular due to its effective framework for storage and computation of data in a single unit. Here, we illustrate two input NAND and NOR gate with the help of QCA based Akers Array as case study. T...

The CMOS transistor has reached the molecular level due to the continuous miniaturization. With devices that small, problems in manufacturing and functionality appear. Since quantum effects become prevalent, technology that would take advantage of them is desirable. One of the proposed novel technologies is the quantum-dot cellular automaton (QCA) [1, 2]. Its basic building block is a QCA cell ...

While still relatively “new”, the quantum-dot cellular automata (QCA) appears to be able to provide many of the properties and functionalities that have made CMOS successful over the past several decades. Early experiments have demonstrated and realized most, if not all, of the “fundamentals” needed for a computational circuit – devices, logic gates, wires, etc. This study introduces the beginn...

Quantum-dot cellular automata (QCA) is a newly-developed nanotechnology for next-generation nanoelectronic circuits. QCA circuits use the propagation of charge polarity in QCA cells to pass information without any current being involved. It has the advantages of extremely small size, low power consumption, high device density and twinkling operation process. Nanofabrication of QCA circuits may ...