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Dear users,<br />
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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?<br />
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Thanks a lot.<br />
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Jiayu<br />
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Jiayu Dai<br />
<br\>Department of Physics<br\>National University of Defense Technology, <br\><br />
Changsha, 410073, P R China<br />
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