Real-space quadrature: A convenient, efficient representation for multipole expansions
Real-space quadrature: A convenient, efficient representation for multipole expansions
Multipolar expansions are a foundational tool for describing basis functions in quantum mechanics, many-body polarization, and other distributions on the unit sphere. Progress on these topics is often held back by complicated and competing formulas for calculating and using spherical harmonics. We present a complete representation for supersymmetric 3D tensors …