A unified methodology achieves floating-point consistent results across DDSCAT, ADDA, and IFDDA solvers and enables fair CPU/GPU benchmarking with provided equivalence tables and software.
Propagation of Electromagnetic Waves on a Rectangular Lattice of Polarizable Points
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abstract
We discuss the propagation of electromagnetic waves on a rectangular lattice of polarizable point dipoles. For wavelengths long compared to the lattice spacing, we obtain the dispersion relation in terms of the lattice spacing and the dipole polarizabilities. We also obtain the polarizabilities required for the lattice to have the same dispersion relation as a continuum medium of given refractive index m.; our result differs slightly from previous work by Draine & Goodman (1993). Our new prescription can be used to assign dipole polarizabilities when the discrete dipole approximation is used to study scattering by finite targets. Results are shown for selected cases.
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physics.comp-ph 1years
2026 1verdicts
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Floating-point consistent cross-verification methodology for reproducible and interoperable DDA solvers with fair benchmarking
A unified methodology achieves floating-point consistent results across DDSCAT, ADDA, and IFDDA solvers and enables fair CPU/GPU benchmarking with provided equivalence tables and software.