A PSWF-based Ewald method achieves target accuracy with fewer Fourier modes and smaller window supports than Gaussian or B-spline versions by exploiting optimal concentration properties and providing explicit error-parameter formulas.
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Fast Ewald Summation using Prolate Spheroidal Wave Functions
A PSWF-based Ewald method achieves target accuracy with fewer Fourier modes and smaller window supports than Gaussian or B-spline versions by exploiting optimal concentration properties and providing explicit error-parameter formulas.