<div>Hi Marcella,</div><div><br /></div><div>Thank you so much. It makes a lot of sense now.</div><div><br /></div><div>Regards,</div><div>Alex<br /></div><br /><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Friday, 7 July 2023 at 04:13:02 UTC-4 Marcella Iannuzzi wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><br></div><div><br></div>Dear Alex, <div><br></div><div>This key seems to be there to anticipate the collocation of a new hill, if the displacement in the CV space is larger than the given threshold. </div><div>The modulo of the CV-displacement vector is calculated and compared to min_disp. </div><div>No distinction among different CVs are considered. I agree that it is not obvious how to sum up together distances, angles or coordination numbers, </div><div>and which threshold would make sense for an heterogeneous selection of CVs. I would tune it on the CV with the largest fluctuation, which is going to be dominant in the </div><div>calculation of the displacement vector. </div><div>The idea is to be in another place of the CV-space, with respect to the previous collocation (only the previous, no history is taken into account), just not to place two subsequent hills one on top of the other. Hence if the sampling moves enough in one direction, the condition is fulfilled. </div><div>For Lagrangian MTD the auxiliary variable are used.</div><div><br></div><div>Regards,</div><div>Marcella</div><div><br></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Friday, July 7, 2023 at 4:51:56 AM UTC+2 Alex Brown wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>Dear CP2K Experts,</div><div><br></div><div>I was reading about using minimum displacement (<a href="https://manual.cp2k.org/trunk/CP2K_INPUT/MOTION/FREE_ENERGY/METADYN.html#MIN_DISP" rel="nofollow" target="_blank" data-saferedirecturl="https://www.google.com/url?hl=en-GB&q=https://manual.cp2k.org/trunk/CP2K_INPUT/MOTION/FREE_ENERGY/METADYN.html%23MIN_DISP&source=gmail&ust=1688870996211000&usg=AOvVaw1-RPCaokr8Gv3lUMS_81vP">MIN_DISP</a> keyword) during Metadynamics where new hills are placed only after a minimum displacement in hills. </div><div><br></div><div>My question is which CV dimension is considered in this displacement? If I use two CV's will the code look for the MIN_DISP in both CV before placing a new hill or just one? I am just confused how this will work if the two CV's have different fluctuations where one CV fluctuates more than the other. Also with Lagrangian version of Metadynamics, will the code look for displacement in auxiliary variable or real variable?</div><div><br></div><div>Thanks,</div><div>Alex<br> </div></blockquote></div></blockquote></div>
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