<div dir="auto">As far as I know, total energy is the summation of different energies e.g kinetic energy (one electron contribution), Hartree energy (potential energy between e and mean field), XC energy, Ewald energy ( potential energy in nucleus),,,in your output file you can get all of these values including total energy. As in MD you just calculate potential energy, you can check in QE output file which energies are resemble for that.<div dir="auto"><br></div><div dir="auto">Best</div><div dir="auto">Md Jahid Hasan</div><div dir="auto">PhD student</div><div dir="auto">University of Maine</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Feb 16, 2024, 8:06 AM Jiancheng Chen <<a href="mailto:13027149168@163.com">13027149168@163.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div style="margin:0">Dear All,</div><div style="margin:0"><div style="margin:0"><span style="font-size:14px">The QE version I use is 7.1.</span></div><div style="margin:0"><span style="font-size:14px">In the calculation of the ground state of the iron atom, my main atomic structure parameters are as follows</span></div><div style="margin:0"><span style="font-size:14px">CELL_PARAMETERS {angstrom}</span></div><div style="margin:0"><span style="font-size:14px">2.8342851 0 0</span></div><div style="margin:0"><span style="font-size:14px">0 2.8342851 0</span></div><div style="margin:0"><span style="font-size:14px">0 0 2.8342851</span></div><div style="margin:0"><span style="font-size:14px">ATOMIC_POSITIONS {crystal}</span></div><div style="margin:0"><span style="font-size:14px">Fe<span style="white-space:pre-wrap"> </span>0 0 0</span></div><div style="margin:0"><span style="font-size:14px">Fe 0.5 0.5 0.5</span></div><div style="margin:0"><span style="font-size:14px">I got a total energy output value of -658.54350602 Ry. My confusion is that I calculated the potential energy of a single iron atom with LAMMPS to be 4.11eV. Is there a relationship between these two energies?</span></div><div style="margin:0"><br></div><div style="margin:0"><pre style="width:1243.84px;word-break:break-word!important">With regards,
Jiancheng</pre></div></div></div>_______________________________________________<br>
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