Ewald Sums for One Dimension

Details Ewald Sums for One Dimension Ewald Sums for One Dimension

2010-07-19

arxiv.org/abs/1007.3055v2

Physics

Mathematical Physics

2 figures added references expanded discussion of algorithm corrected figures added discussion of screened force

Scientific paper

We derive analytic solutions for the potential and field in a one-dimensional system of masses or charges with periodic boundary conditions, in other words Ewald sums for one dimension. We also provide a set of tools for exploring the system evolution and show that it's possible to construct an efficient algorithm for carrying out simulations. In the cosmological setting we show that two approaches for satisfying periodic boundary conditions, one overly specified and the other completely general, provide a nearly identical clustering evolution until the number of clusters becomes small, at which time the influence of any size-dependent boundary cannot be ignored. Finally we compare the results with other recent work with the hope of providing clarification over differences these issues have induced. We explain that modern formulations of physics require a well defined potential which is not available if the forces are screened directly.

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