GW double precision vs single precision

GW, Bethe-Salpeter …

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GW double precision vs single precision

Post by rundong » Thu Apr 07, 2011 4:13 am

Dear all,

I have tried both in the rutile GW gap following the tutorial and found little difference between the results. However, it seems to me, the single precision GW calculation is much faster. I am wondering what the downside it might be by using single precision. Is it possible when denser k-mesh is used, there will be big difference, since I am only using one k-point now?
Thanks in advance.