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Title: Hierarchical Particle Mesh: An FFT-accelerated Fast Multipole Method

Journal Article · · The Astrophysical Journal. Supplement Series (Online)
 [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States)

I observe a modification to the original Fast Multipole Method (FMM) of Greengard & Rokhlin that approximates the gravitation field of an FMM cell as a small uniform grid (a “gridlet”) of effective masses. The effective masses on a gridlet are set from the requirement that the multipole moments of the FMM cells are reproduced exactly, thus preserving the accuracy of the gravitational field representation. The measurement of the gravitational field from a multipole expansion can then be computed for all multipole orders simultaneously, with a single Fast Fourier Transform, significantly reducing the computational cost at a given value of the required accuracy. The described approach belongs to the class of “kernel independent” variants of the FMM method and works with any Green function.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1545079
Report Number(s):
arXiv:1906.10734; FERMILAB-PUB-19-277-A; 1741462
Journal Information:
The Astrophysical Journal. Supplement Series (Online), Vol. 243, Issue 2; ISSN 1538-4365
Publisher:
American Astronomical Society/IOPCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (20)

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Far-field compression for fast kernel summation methods in high dimensions journal July 2017
A fast algorithm for three-dimensional potential fields calculation: fast Fourier transform on multipoles journal November 2003
Real-space quadrature: A convenient, efficient representation for multipole expansions journal February 2015
Performance of fast multipole methods for calculating electrostatic interactions in biomacromolecular simulations journal January 1994
Simple recursive implementation of fast multipole method journal January 2010
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A kernel-independent adaptive fast multipole algorithm in two and three dimensions journal May 2004

Cited By (1)

Projection-tree reduced-order modeling for fast N-body computations journal June 2022

Figures / Tables (4)


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