1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario registrado en Universia


Opción 1: Descargar recurso

Detalles del recurso

Descripción

We have investigated the behavior of bistable cells made up of four quantum dots and occupied by two electrons, in the presence of realistic confinement potentials produced by depletion gates on top of a GaAs/AlGaAs heterostructure. Such a cell represents the basic building block for logic architectures based on the concept of quantum cellular automata (QCA) and of ground state computation, which have been proposed as an alternative to traditional transistor-based logic circuits. We have focused on the robustness of the operation of such cells with respect to asymmetries derived from fabrication tolerances. We have developed a two-dimensional model for the calculation of the electron density in a driven cell in response to the polarization state of a driver cell. Our method is based on the one-shot configuration-interaction technique, adapted from molecular chemistry. From the results of our simulations, we conclude that an implementation of QCA logic based on simple ¿hole arrays¿ is not feasible, because of the extreme sensitivity to fabrication tolerances. As an alternative, we propose cells defined by multiple gates, where geometrical asymmetries can be compensated for by adjusting the bias voltages. Even though not immediately applicable to the implementation of logic gates and not suitable for large scale integration, the proposed cell layout should allow an experimental demonstration of a chain of QCA cells.

Pertenece a

RECERCAT  

Autor(es)

Governale, Michele -  Macucci, Massimo -  Iannacone, G. -  Ungarelli, Carlo -  Martorell Domènech, Juan - 

Id.: 55210018

Idioma: eng  - 

Versión: 1.0

Estado: Final

Palabras clavePropietats elèctriques - 

Tipo de recurso: info:eu-repo/semantics/article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: (c) American Institute of Physics, 1999

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 13-nov-2013

Contacto:

Localización:

Otros recursos que te pueden interesar

  1. Interference of HTLV-1 Tax Protein with Cell Polarity Regulators : Defining the Subcellular Localization of the Tax-DLG1 Interaction Human T cell leukemia virus (HTLV)-1 Tax (Tax) protein is very important in viral replication and ce...
  2. The effect of dry salting on the shelf life of big mouth saury (Scomberoides commersonnianus) The present study investigated the effects of salting process on shelf life of big mouth saury (Scom...
  3. Some biological aspects of Mesopotamichthys sharpeyi in Shadegan Wetland, Iran Some biological aspects of Mesopotamichthys sharpeyi were studied in Shadegan Wetland, Iran. Monthly...
  4. The effects of Zataria multiflora on inhibition of polyphenoloxidase and melanosis formation in shrimp (Litopenaeus vannamei) Shrimp melanosis (black spot) is an important surface discoloration caused by polyphenol oxidase (ty...
  5. Effect of fluoxetine on food intake and feeding behavior of goldfish Carassius auratus Serotonin is one of the monoamines that play an important role in food intake in mammalian species. ...

Otros recursos de la mismacolección

No existen otros recursos

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.