<div>Dear Benjamin,</div><div>Conceptually, this may not work because rSE is a correction from the non-diagonal elements of the Fock matrix plus higher-order terms normalized by differences in (semi-canonical) orbital energies
whereas EXX/HF considers diagonal blocks of the occupied elements.</div><div>If you want to apply your method nethertheless, you could try the ENERGY_CORRECTION section (https://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/DFT/ENERGY_CORRECTION.html), probably with ENERGY_FUNCTIONAL DCDFT to extract the EXX part. This skips the expensive RPA calculation step. Unfortunately, I have never used this method but maybe other people can jump in if you have any questions to these methods.</div><div>Best,</div><div>Frederick<br /></div><br /><div class="gmail_quote"><div dir="auto" class="gmail_attr">Benjamin Shi schrieb am Freitag, 1. November 2024 um 12:41:16 UTC+1:<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 forum,<div><br></div><div>My understanding is that RPA+rSE does not have gradients currently available. I was wondering whether in a standard RPA calculation, it would be possible to output the gradients from the EXX component of RPA (or do it in a separate calculation), such that I can subtract these EXX gradients from the total RPA gradients and add in HF gradients to get an effective RPA+rSE with gradients.</div><div><br></div><div>Best wishes,</div><div>Benjamin</div></blockquote></div>
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