eBook - ePub

Introduction to the Fast Multipole Method

Name: Introduction to the Fast Multipole Method
Author: Victor Anisimov, James J.P. Stewart

Topics in Computational Biophysics, Theory, and Implementation

Victor Anisimov,

James J.P. Stewart,

448 pages
English
ePUB (mobile friendly)
Available on iOS & Android

eBook - ePub

Introduction to the Fast Multipole Method

Topics in Computational Biophysics, Theory, and Implementation

Victor Anisimov,

James J.P. Stewart,

Book details

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About This Book

Introduction to the Fast Multipole Method introduces the reader to the theory and computer implementation of the Fast Multipole Method. It covers the topics of Laplace's equation, spherical harmonics, angular momentum, the Wigner matrix, the addition theorem for solid harmonics, and lattice sums for periodic boundary conditions, along with providing a complete, self-contained explanation of the math of the method, so that anyone having an undergraduate grasp of calculus should be able to follow the material presented. The authors derive the Fast Multipole Method from first principles and systematically construct the theory connecting all the parts.

Key Features

Introduces each topic from first principles

Derives every equation presented, and explains each step in its derivation

Builds the necessary theory in order to understand, develop, and use the method

Describes the conversion from theory to computer implementation

Guides through code optimization and parallelization

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Information

Publisher

CRC Press

Year

2019

ISBN

9780429526510

Edition

Topic

Biological Sciences

Subtopic

Biology

Index

Biological Sciences

Legendre Polynomials

Electrostatics is a branch of physics that deals with determining the electrostatic potential created by a system of stationary or slowly moving electric charges. Elementary electrostatic theory for a system of point charges is rather straightforward. It consists of the Coulomb law and the superposition principle, summing over the independent pairwise interactions of individual particles. The Coulomb law describes the force, Fi, acting on particle i having charge qi arising from other particles having charge qj:

$F_{i} = q_{i} \sum_{j} \frac{q_{j}}{\| r_{i} - r_{j} \|^{2}} \frac{r_{i} - r_{j}}{\| r_{i} - r_{j} \|},$	(1.1)

where ri = (xi, yi, zi) represents a coordinate vector of particle i. Summation over the particles reflects the superposition principle according to which each pairwise interaction is essentially independent of the other ones.

Integration of Equation 1.1 leads to the definition of electrostatic potential, Φi:

$Φ_{i} = \sum_{j} \frac{q_{j}}{\| r_{i} - r_{j} \|},$	(1.2)

which, if multiplied by particle charge, qi, gives the electrostatic energy, Ui = qi Φi that particle i has in the presence of other charge sources j. Although, historically, the theory of electrosta...

Cover
Half Title
Title Page
Copyright Page
Contents
Preface
1. Legendre Polynomials
2. Associated Legendre Functions
3. Spherical Harmonics
4. Angular Momentum
5. Wigner Matrix
6. Clebsch–Gordan Coefficients
7. Recurrence Relations for Wigner Matrix
8. Solid Harmonics
9. Electrostatic Force
10. Scaling of Solid Harmonics
11. Scaling of Multipole Translations
12. Fast Multipole Method
13. Multipole Translations along the z-Axis
14. Rotation of Coordinate System
15. Rotation-Based Multipole Translations
16. Periodic Boundary Conditions
Appendix
Bibliography
Index