<DIV><EM>Dear all</EM></DIV>
<DIV><EM> 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 </EM>computing the GW quasi-particle energies is the following<EM> :</EM></DIV>
<DIV>1. pw.x<BR>2. pw4gww.x<BR>3. gww.x<BR>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 ?</DIV>
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<DIV>Best regards</DIV>
<DIV> </DIV>
<DIV>Q.J.Wang</DIV>
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<DIV>XiangTan University </DIV></DIV><br><br><span title="neteasefooter"/></span>