Integration forN - body
نویسندگان
چکیده
Multiple time stepping can be applied to the leapfrog/Stt ormer/Verlet integrator so as to eeect variable stepsize. The strategy maintains the symplecticness, time-reversibility, and second-order accuracy of leapfrog. This method can be applied to pairwise interactions by partitioning them into distance classes and smoothly decomposing the potential energy into the sum of potential energy functions for the respective classes. The variable stepsize method described here is much more eecient than leapfrog with very small stepsizes and more accurate than leapfrog with larger stepsizes.
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