<div>Dear Kristina,</div><div><br></div><div>It is not directly possible to carry out MP2 calculations without correlating all electrons. You can only carry out a GAPW calculation with a pseudopotential.</div><div><br></div><div>Best,</div><div>Frederick<br></div><br><div class="gmail_quote"><div dir="auto" class="gmail_attr">Kristina H schrieb am Dienstag, 11. Mai 2021 um 17:04:17 UTC+2:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Dear CP2K group,<div><p>I am doing some GAPW MP2 calculations on a single water
molecule to familiarize myself with CP2K. I am wondering if there is a way to
NOT correlate the O(1s) electrons when doing MP2. I have looked through the
online manual (v8.1) and was not able to find a keyword for that.</p>
<p>Thank you for the help!</p><p>Kristina</p></div></blockquote></div>