Back-of-the-Envelope Quantum Mechanics:With Extensions to - download pdf or read online

By Maxim Olshanii

ISBN-10: 9814508462

ISBN-13: 9789814508469

Dimensional and order-of-magnitude estimates are practiced through nearly every body yet taught virtually nowhere. while physics scholars have interaction of their first theoretical examine undertaking, they quickly examine that precisely solvable difficulties belong merely to textbooks, that numerical versions are lengthy and source eating, and that “something else” is required to quick achieve perception into the procedure they're going to learn. Qualitative tools are this “something else”, yet ordinarily, scholars have by no means heard of them before.

The goal of this ebook is to coach the craft of qualitative research utilizing a collection of difficulties, a few with options and a few with out, in complicated undergraduate and starting graduate Quantum Mechanics. Examples comprise a dimensional research answer for the spectrum of a quartic oscillator, uncomplicated WKB formulation for the matrix components of a coordinate in a gravitational good, and a three-line-long estimate for the ionization strength of atoms uniformly legitimate around the entire periodic desk. The pièce de résistance within the assortment is a sequence of dimensional research questions in Integrable Nonlinear Partial Differential Equations without dimensions present a priori. Solved difficulties comprise the connection among the scale and the rate of solitons of the Korteweg–de Vries equation and an expression for the oscillation interval of a Nonlinear Schrödinger breather as a functionality of its width.

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Back-of-the-Envelope Quantum Mechanics:With Extensions to Many-Body Systems and Integrable PDEs by Maxim Olshanii

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