指出一维单原子链的格波解是由于采用了循环边界条件的结果。
The lattice wave solution of single atomic chain only results from the cyclic boundary condition.
在不使用循环边界条件情况下，求解出一维原子链的振动解析解。
We get the lattice wave solution of monatomic chain under the free boundary condition.
通过数值计算，我们得到一维双原子链在自由边界与循环边界条件下的频谱。
Through numerical calculation, we get the frequency spectrum of one-dimensional diatomic chain in free and periodic boundary conditions.
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