Quantum-dot cellular automata (QCA) is a novel and potentially attractive technology for implementing computing architectures at the nano-scale. By applying a set of simple layout rules, arbitrary circuits can be made using QCA cells. In this work, we describe the design and layout of a QCA random access memory (RAM), showing the layout of individual memory cells, as well as, a suggested layout...

This article describes the design of ultra-low-power multipliers on quantumdot cellular automata (QCA) nanotechnology, promising very dense circuits and high operating frequencies, using a single homogeneous layer of the basic cells. We construct structures without the earlier noise problems, verified by the QCADesigner coherence vector simulation. Our results show that the wiring overhead of t...

We consider the effects of interaction with the environment on decoherence in quantum-dot cellular automata (QCA). We model the environment as a Coulombically interacting random assembly of quantum double-dots. The time evolution of our model system þ environment is unitary and maintains one coherent state. We explicitly calculate the reduced density operators for the system and for the environ...

The use of buried dopants to construct quantum-dot cellular automata is investigated as an alternative to conventional electronic devices for information transport and elementary computation. This provides a limit in terms of miniaturization for this type of system as each potential well is formed by a single dopant atom. As an example, phosphorous donors in silicon are found to have good energ...

Magnetic Quantum-Dot Cellular Automata: Recent Developments and Prospects A. Orlov1 ∗, A. Imre1 2, G. Csaba3, L. Ji1, W. Porod1, and G. H. Bernstein1 1University of Notre Dame, Center for Nano Science and Technology, Notre Dame, IN 46556, USA 2Currently at Argonne National Laboratory, Materials Science Division and Center for Nanoscale Materials, Argonne, IL 60439, USA 3Technical University of ...

We present an experimental demonstration of a fanout gate for quantum-dot cellular automata (QCA), where a signal applied to a single input cell is amplified by that cell and sent to two output cells. Each cell is a single-electron latch composed of three metal dots, which are connected in series by tunnel junctions. Binary information is represented by an excess electron localized to one of th...

Among the emerging technologies Field-Coupled devices like Quantum dot Cellular Automata are one of the most interesting. Of all the practical implementations of this principle NanoMagnet Logic shows many important features, such like a very low power consumption and the feasibility with up-to-date technology. However its working principle, based on the interaction among neighbor cells, is quit...

We report direct measurements of the charging diagram of a nanoscale series double-dot system at low temperatures. Our device consists of four metal dots, with two of them in series forming a double-dot, and the other two serving as electrometers for the double-dot system. This configuration allows us to externally detect all possible charge transitions within a double-dot system. Specifically,...

In this paper we consider electromagnetic field quantization in the presence of a dispersive and absorbing semiconductor quantum dot. By using macroscopic approach and Green's function method, quantization of electromagnetic field is investigated. Interaction of a two-level atom , which is doped in a semiconductor quantum dot, with the quantized field is considered and its spontaneous emission ...

In CMOS technology AND-OR combination logic is used because of the ease of its minimization using different established methodologies such as K-map. On the other hand, majority gatebased logic is not handled well in standard CMOS technologies, primarily because of the hardware inefficiencies in creating majority gates. As a result no optimization techniques of circuits based on majority gates w...