Abstract
An algorithm for fast calculation of the Coulombic forces and energies
of point particles with free boundary conditions is proposed. Its
calculation time scales as N log N for N particles. This novel method
has lower crossover point with the full O(N^2) direct summation than
the Fast Multipole Method. The forces obtained by our algorithm are
analytical derivatives of the energy which guarantees energy conservation
during a molecular dynamics simulation. Our algorithm is very simple.
An MPI parallelised version of the code can be downloaded under the
GNU General Public License from the website of our group.
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