Bøger af Eric J. Heller

A groundbreaking textbook that explores the phenomena and physics of music and soundWhy You Hear What You Hear is the first book on the physics of sound for the nonspecialist to empower readers with a hands-on, ears-open approach that includes production, analysis, and perception of sound. The book makes possible a deep intuitive understanding of many aspects of sound, as opposed to the usual approach of mere description. This goal is aided by hundreds of original illustrations and examples, many of which the reader can reproduce and adjust using the same tools used by the author (e.g., very accessible applets for PC and Mac, and interactive web-based examples, simulations, and analysis tools that can be found on the book's website: whyyouhearwhatyouhear.com). Readers are positioned to build intuition by participating in discovery.This truly progressive introduction to sound engages and informs amateur and professional musicians, performers, teachers, sound engineers, students of many stripes, and indeed anyone interested in the auditory world. The book does not hesitate to follow entertaining and sometimes controversial side trips into the history and world of acoustics, reinforcing key concepts. You will discover how musical instruments really work, how pitch is perceived, and how sound can be amplified with no external power source.Sound is key to our lives, and is the most accessible portal to the vibratory universe. This book takes you there.The first book on sound to offer interactive tools, building conceptual understanding via an experiential approachSupplementary website (http://www.whyyouhearwhatyouhear.com) provides Java, MAX, and other free, multiplatform, interactive graphical and sound appletsExtensive selection of original exercises available on the web with solutionsNearly 400 full-color illustrations, many of simulations that students can do

A graduate-level text that examines the semiclassical approach to quantum mechanicsPhysical systems have been traditionally described in terms of either classical or quantum mechanics. But in recent years, semiclassical methods have developed rapidly, providing deep physical insight and computational tools for quantum dynamics and spectroscopy. In this book, Eric Heller introduces and develops this subject, demonstrating its power with many examples. In the first half of the book, Heller covers relevant aspects of classical mechanics, building from them the semiclassical way through the semiclassical limit of the Feynman path integral. The second half of the book applies this approach to various kinds of spectroscopy, such as molecular spectroscopy and electron imaging and quantum dynamical systems with an emphasis on tunneling. Adopting a distinctly time-dependent viewpoint, Heller argues for semiclassical theories from experimental and theoretical vantage points valuable to research in physics and chemistry. Featuring more than two hundred figures, the book provides a geometric, phase-space, and coordinate-space pathway to greater understanding.Filled with practical examples and applications, The Semiclassical Way to Dynamics and Spectroscopy is a comprehensive presentation of the tools necessary to successfully delve into this unique area of quantum mechanics.A comprehensive approach for using classical mechanics to do quantum mechanicsMore than two hundred figures to assist intuitionEmphasis on semiclassical Green function and wave packet perspective, as well as tunneling and spectroscopyChapters include quantum mechanics of classically chaotic systems, quantum scarring, and other modern dynamical topics