[Pw_forum] Spectra from GW and TDDFPT

[jiayudai]

Dear users,

It is well known that GW method can give much more accurate band gap since it considers many body interaction, and thus it can give more accurate optical properties. What i am thinking is that what's the difference between the optical properties from TDDFPT and GW. I mean, TDDFPT has the same accuracy as the GW method? or what's the advantage of TDDFPT over the GW except the computationl cost?

Thanks a lot.

Jiayu


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Jiayu Dai
Department of PhysicsNational University of Defense Technology, 
Changsha, 410073, P R China
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