[Pw_forum] GW

[Q.J.Wang]

Dear all
     I have a problem about the GW method. In the forum, I found some people said GW allows to address large systems (a few hundreds of atoms).But I don't know where ？ We know the course of computing the GW quasi-particle  energies is  the following :
1. pw.x
2. pw4gww.x
3. gww.x
If we want to calculate a large system, we must optimized it first with pw.x which is still time-consuming. So I want to know what makes the GW code can calculate the large system and where it reflects in the course of using GW code ?
 
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Best regards
 
Q.J.Wang
 
XiangTan University 
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