Path Integrals in Quantum Mechanics

Path Integrals in Quantum Mechanics

by Jean Zinn-Justin
     
 

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ISBN-10: 0198566743

ISBN-13: 9780198566748

Pub. Date: 02/03/2005

Publisher: Oxford University Press, USA

The main goal of this book is to familiarize the reader with a tool, the path integral, that not only offers an alternative point of view on quantum mechanics, but more importantly, under a generalized form, has also become the key to a deeper understanding of quantum field theory and its applications, extending from particle physics to phase transitions or

Overview

The main goal of this book is to familiarize the reader with a tool, the path integral, that not only offers an alternative point of view on quantum mechanics, but more importantly, under a generalized form, has also become the key to a deeper understanding of quantum field theory and its applications, extending from particle physics to phase transitions or properties of quantum gases.
Path integrals are mathematical objects that can be considered as generalizations to an infinite number of variables, represented by paths, of usual integrals. They share the algebraic properties of usual integrals, but have new properties from the viewpoint of analysis. They are powerful tools for the study of quantum mechanics, since they emphasize very explicitly the correspondence between classical and quantum mechanics. Physical quantities are expressed as averages over all possible paths but, in the semi-classical limit, the leading contributions come from paths close to classical paths. Thus, path integrals lead to an intuitive understanding of physical quantities in the semi-classical limit, as well as simple calculations of such quantities. This observation can be illustrated with scattering processes, spectral properties or barrier penetration effects. Even though the formulation of quantum mechanics based on path integrals seems mathematically more complicated than the usual formulation based on partial differential equations, the path integral formulations well adapted to systems with many degrees of freedom, where a formalism of Schrödinger type is much less useful. It allows simple construction of a many-body theory both for bosons and fermions.

Product Details

ISBN-13:
9780198566748
Publisher:
Oxford University Press, USA
Publication date:
02/03/2005
Series:
Oxford Graduate Texts Series
Pages:
332
Product dimensions:
9.50(w) x 6.70(h) x 1.00(d)

Table of Contents

1. Gaussian integrals
2. Path integral in quantum mechanics
3. Partition function and spectrum
4. Classical and quantum statistical physics
5. Path integrals and quantization
6. Path integral and holomorphic formalism
7. Path integrals: fermions
8. Barrier penetration: semi-classical approximation
9. Quantum evolution and scattering matrix
10. Path integrals in phase space
Quantum mechanics: minimal background
A1. Hilbert space and operators
A2. Quantum evolution, symmetries and density matrix
A3. Position and momentum. Scrödinger equation

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