Dear Jiayu Dai,<br>Prof. R. Godby is one of the most famous scientist who worked on many-body theory. i think this lecture should be help full for you.<br>{Many-Body Theory and DFT / TDDFT<br>Rex Godby"<br><a href="http://docs.google.com/viewer?a=v&q=cache:gBMHk9QaO3cJ:www.tddft.org/TDDFT2006/2006tddft/docs/school/Godby.pdf+TDDFT+and+GW&hl=en&pid=bl&srcid=ADGEESiq9Au0dGZsFvyPUtLL9nEaPg44xzN8NzkJiiguvyAdyTFUpucP8XOKWMyrKammwPLMDfQZncmtgoh8NA-PFsRKaUxsRnrdbFId7a7dW2mkkOHqrr4TFgpalZC775KF1njtbF4p&sig=AHIEtbTLv5XgSx5m0wfXO3sMV7vzJlgOtg&pli=1">http://docs.google.com/viewer?a=v&q=cache:gBMHk9QaO3cJ:www.tddft.org/TDDFT2006/2006tddft/docs/school/Godby.pdf+TDDFT+and+GW&hl=en&pid=bl&srcid=ADGEESiq9Au0dGZsFvyPUtLL9nEaPg44xzN8NzkJiiguvyAdyTFUpucP8XOKWMyrKammwPLMDfQZncmtgoh8NA-PFsRKaUxsRnrdbFId7a7dW2mkkOHqrr4TFgpalZC775KF1njtbF4p&sig=AHIEtbTLv5XgSx5m0wfXO3sMV7vzJlgOtg&pli=1</a><br>
<br>Hope it helps,<br><br><br><div class="gmail_quote">2011/4/13 jiayudai <span dir="ltr"><<a href="mailto:daijiayu@nudt.edu.cn">daijiayu@nudt.edu.cn</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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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>
Department of PhysicsNational University of Defense Technology, <br>
Changsha, 410073, P R China<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div>Mohsen Modarresi, </div>
<div>PhD student of Solid State Physics, Ferdowsi University of Mashhad, Iran.<br>Phone +98-9133452131</div><br>