Libros de Estudios y ensayos, página 22 de 143

Since an atomic Bose-Einstein condensate, predicted by Einstein in 1925, was first produced in the laboratory in 1995, the study of ultracold Bose and Fermi gases has become one of the most active areas in contemporary physics. This book explains phenomena in ultracold gases from basic principles, without assuming a detailed knowledge of atomic, condensed matter, and nuclear physics. This new edition has been revised and updated, and includes new chapters on optical lattices, low dimensions, and strongly-interacting Fermi systems. This book provides a unified introduction to the physics of ultracold atomic Bose and Fermi gases for advanced undergraduate and graduate students, as well as experimentalists and theorists. Chapters cover the statistical physics of trapped gases, atomic properties, cooling and trapping atoms, interatomic interactions, structure of trapped condensates, collective modes, rotating condensates, superfluidity, interference phenomena, and trapped Fermi gases. Problems are included at the end of each chapter.

he book is an introductory text to the physics of Bose-Einstein condensation. This phenomenon, first predicted by Einstein in 1925, has been realized experimentally in 1995 in a remarkable series of experiments whose importance has been recognized by the award of the 2001 Nobel Prize in Physics. The condensate is actually a new state of matter, where quantum-mechanical wave functions of atoms behave as coherent matter waves in the same way as coherent light waves in the case of a laser. The authors provide a theoretical presentation of the main concepts underlying the physics of dilute atomic gases in conditions of extremely low temperatures where quantum effects play a crucial role. The main effort is devoted to discussion of the relevant theoretical aspects exhibited by these systems, such as the concept of order parameter, long range order, superfluidity and coherence. The mathematical formalism is presented in a form convenient for practical use. The book develops the theory of Bose gases starting from the pioneering Bogoliubov approach and gives special emphasis to the new physical features exhibited by non-uniform gases which are produced in the recent experiments with magnetic and optical traps. These features include the determination of the equilibrium profiles, the collective oscillations, the mechanism of the expansion of the gas after releasing the trap, the interference patterns obtained by overlapping two condensates, the rotational properties revealing the effects of superfluidity (quantized vortices, behaviour of the moment of inertia), the Josephson-like phenomena associated with the coherence of the phase, the beyond mean field phenomena exhibited by quantum gases in conditions of reduced dimensionality (1D and 2D) etc. The book also discusses the analogies and differences with the physics of "classical" superfluids like liquid helium and introduces some of the major features of trapped Fermi gases at low temperature, pointing out the consequences of superfluidity.

Como el Suplemento de temas avanzados puede ser de interés a muchos estudiantes que cursen la Física del P.S.S.C., se recomienda en tales casos la lectura de esta Guía, que les ayudará en el estudio

Física. Mecánica, ondas y termodinámica Roller, D. E.; Blum, R. La redacción de esta obra ha llevado más de doce años. Numerosas personas han suministrado consejos, sugerencias útiles, críticas acertadas e indicaciones durante los aos que estuvieron empleando la edicion preliminar en los cursos que impartian en distintas Universidades. La organizacion de todo material didactico es esencialmente clasica, con tres excepciones importantes:1. Se escribe sobre conceptos, en vez de hacerlo sobre fenomenos aislados.2. Se incluye el material historico necesario para que el alumno pueda seguir hasta nuestros dias el crecimiento de los conocimientos cientificos actuales. 3. Se enseña al estudiante el funcionamiento y forma de utilizar la calculadora de mano programable.

El contenido de este libro se basa en el material recogido en un primer curso de Ingeniería mecánica de pregraduados, y se presenta como una base razonablemente completa de trabajo fundamental que es esencial para cualquier estudio mas avanzado de esta materia.

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