<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10px"><div id="yui_3_16_0_ym19_1_1462186218221_6623">
</div><div id="yui_3_16_0_ym19_1_1462186218221_6624" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Dear all</div>
<div id="yui_3_16_0_ym19_1_1462186218221_6625" dir="ltr" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I am trying to determine the electric dipole polarizability of C60. <br></div><div id="yui_3_16_0_ym19_1_1462186218221_6637" dir="ltr" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Using Phonon, I got a single value, whereas whit TDDFPT the dipole</div><div id="yui_3_16_0_ym19_1_1462186218221_6644" dir="ltr" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> polarizability for each value of the frequency is a 3*3 matrix. I would like <br></div><div id="yui_3_16_0_ym19_1_1462186218221_6645" dir="ltr" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">to know if the tow calculations are equivalent.</div><div id="yui_3_16_0_ym19_1_1462186218221_6646" dir="ltr" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"> If there are, How can I move from the matrix to the single value.</div><div id="yui_3_16_0_ym19_1_1462186218221_6446"><br><span></span></div><div id="yui_3_16_0_ym19_1_1462186218221_6615"><br><span></span></div><div id="yui_3_16_0_ym19_1_1462186218221_6626"><span></span></div><div id="yui_3_16_0_ym19_1_1462186218221_6447"> </div><div id="yui_3_16_0_ym19_1_1462186218221_6448" class="signature"><div id="yui_3_16_0_ym19_1_1462186218221_6596">Anne Justine ETINDELE <br></div><div id="yui_3_16_0_ym19_1_1462186218221_6539">Assistant Lecturer <br></div><div id="yui_3_16_0_ym19_1_1462186218221_6544">Higher Teachers Training College</div><div id="yui_3_16_0_ym19_1_1462186218221_6574"> University of Yaounde I P.O. Box 47 Yaounde <br></div>Cameroon</div></div></body></html>