Libros de Informática práctica, página 65 de 418

Adiabatic quantum computation (AQC) is an alternative to the better-known gate model of quantum computation. The two models are polynomially equivalent, but otherwise quite dissimilar: one property that distinguishes AQC from the gate model is its analog nature. Quantum annealing (QA) describes a type of heuristic search algorithm that can be implemented to run in the "native instruction set" of an AQC platform. D-Wave Systems Inc. manufactures {quantum annealing processor chips} that exploit quantum properties to realize QA computations in hardware. The chips form the centerpiece of a novel computing platform designed to solve NP-hard optimization problems. Starting with a 16-qubit prototype announced in 2007, the company has launched and sold increasingly larger models: the 128-qubit D-Wave One system was announced in 2010 and the 512-qubit D-Wave Two system arrived on the scene in 2013. A 1,000-qubit model is expected to be available in 2014. This monograph presents an introductory overview of this unusual and rapidly developing approach to computation.We start with a survey of basic principles of quantum computation and what is known about the AQC model and the QA algorithm paradigm. Next we review the D-Wave technology stack and discuss some challenges to building and using quantum computing systems at a commercial scale. The last chapter reviews some experimental efforts to understand the properties and capabilities of these unusual platforms. The discussion throughout is aimed at an audience of computer scientists with little background in quantum computation or in physics.s

Focuses on a recent approach to adiabatic perturbation theory, which emphasizes the role of effective equations of motion and the separation of the adiabatic limit from the semiclassical limit. A detailed introduction gives an overview of the subject and makes the later chapters accessible also to readers less familiar with the material. Although the general mathematical theory based on pseudodifferential calculus is presented in detail, there is an emphasis on concrete and relevant examples from physics. Applications range from molecular dynamics to the dynamics of electrons in a crystal and from the quantum mechanics of partially confined systems to Dirac particles and nonrelativistic QED.

Con el surgimiento de los teléfonos inteligentes, aparecieron también grandes dificultades para desarrollar aplicaciones móviles compatibles con todos los dispositivos. Hoy en día, dicho problema ha sido superado gracias a la aparicion del sistema operativo Android, que es capaz de servir de soporte a una gran variedad de aplicaciones y dispositivos. Este libro trata detalladamente sobre este sistema y tiene como objetivo iniciar y orientar al lector interesado en el amplio mundo del desarrollo de aplicaciones moviles. Este libro comprende temas como la programacion orientada a objetos, el manejo de Android Studio, el tratamiento de los controles para programacion en Android, el desarrollo de HTML5, los codigos ocultos, las aplicaciones mas recomendadas, entre otros. Cuenta, ademas, con una parte practica basada en ejercicios desarrollados que reforzaran y estimularan al lector a explotar todo su potencial logico. La presente obra esta dirigida a estudiantes de informatica, ingenieria de sistemas y afines. Asimismo, a todos aquellos que busquen innovar e implementar aplicaciones moviles con Android. Ademas, en la parte inferior de la primera pagina del libro encontrara el codigo de acceso que le permitira acceder de forma gratuita a los contenidos adicionales del libro en www.marcombo.info .