<div dir="ltr">See attached notes - Paolo<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 10, 2017 at 4:45 PM, Miguel Carvajal <span dir="ltr"><<a href="mailto:krvajal.miguelangel@gmail.com" target="_blank">krvajal.miguelangel@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div name="messageBodySection" style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">Dear all,
<div>when representing the plane wave expansion of the KS orbital several conventions are found in the literature. Just wondering which one of the following is the one used in QE?</div>
<div><br></div>
<div><b>1)</b></div>
<div>psi(r) = \sum C(G) e^{i G r)</div>
<div>C(G) = 1/Omega \sum psi(r) e^(-i Gr)</div>
<div><b>2) </b></div>
<div>
<div>psi(r) = 1/sqrt(Omega) \sum C(G) e^{i G r)</div>
<div>C(G) = 1/sqrt(Omega) \sum psi(r) e^(-i Gr)</div>
</div>
<div><br></div>
<div>
<div><b>3)</b> </div>
<div>
<div>psi(r) = 1/Omega \sum C(G) e^{i G r)</div>
<div>C(G) = \sum psi(r) e^(-i Gr)</div>
</div>
</div>
<div><br></div>
<div>I have omitted the k dependence for brevity reasons</div>
<div><br></div>
<div>Best regards,</div>
</div>
<div name="messageSignatureSection" style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif"><br>
<span>Lic. Miguel Carvajal - Instituto Balseiro - Bariloche</span>
<pre style="font-variant-ligatures:normal"><a href="tel:+54%20294%20478-2429" value="+542944782429" target="_blank">[+54] 2944782429</a> (tel) / krvajal.miguel (skype)</pre>
<pre style="font-variant-ligatures:normal">LinkedIn: <a href="https://www.linkedin.com/in/krvajal/" target="_blank">in/krvajal</a><br></pre></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, <span>Dip. Scienze Matematiche Informatiche e Fisiche</span>,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>
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