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arXiv math-ph/0506006math-phmath.MPphysics.comp-ph
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d维周期格林函数的快速计算

Rapid evaluation of the periodic Green's function in d dimensions

Sandeep Tyagi

摘要:

给出了任意整数维Poisson方程在周期边界条件下的格林函数的一种求法。我们得到的递归关系的解决方案在d-维空间中的(d-1)维空间。在原点附近,格林函数分裂成两部分,一部分是本质库仑奇点,另一部分是正则的。因此,我们能够给出更高维的库仑和的表示,而不需要求助于任何积分表示。该表达式在模拟单元的所有部分均以指数速度收敛。几位作者的作品被证明是这种更一般的方法的特殊情况。

英文摘要:

A method is given to obtain the Green's function for the Poisson equation in any arbitrary integer dimension under periodic boundary conditions. We obtain recursion relations which relate the solution in d-dimensional space to that in (d-1)-dimensional space. Near the origin, the Green's function is shown to split in two parts, one is the essential Coulomb singularity and the other part is regular. We are thus able to give representations of the Coulomb sum in higher dimensions without taking recourse to any integral representations. The expressions converge exponentially fast in all part of the simulation cell. Works of several authors are shown to be special cases of this more general method.

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