[Pw_forum] Real displacements from the complex eigenvectors

[A F]

Hello pw_forum,

I have a question with regard to the normal modes at non G-point (q/=0).
As discussed previously [1], phase is random.
Thus my question is, how one can obtain displacements in real space from those complex displacements?


1. http://qe-forge.org/pipermail/pw_forum/2006-August/079408.html

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Alexandr Fonari,
graduate student,
Georgia Institute of Technology.
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