<div dir="auto">This is a good question but it depends on what you are simulating. If it is non- equilibrium system then it is pointless to look at the energy, temperature, pressure etc.<div dir="auto"><br></div><div dir="auto">If it is equilibrium system, it should be similar to classical MD but on a shorter time scale. There is a tutorial how to calculate IR spectra with cp2k, you can find steps there for equilibration and spectrum data acquisition. </div><div dir="auto">It is on cp2k website.</div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 20, 2022, 5:33 PM jing liang <<a href="mailto:jingliang2015@gmail.com">jingliang2015@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<div><br></div><div>I created a simulation box manually and then started a minimisation process</div><div>by using geometry optimisation. My goal is not to get a fully optimised structure</div><div>but to start a MD simulation using the NVE ensemble. My question is if one needs</div><div>a fully optimised structure in order to start MD or if there is a criterion to say</div><div>that the minimised structure is already fine? </div><div><br></div><div>I am coming from classic MD simulations where some software suggest to have</div><div>the forces converged up to some particular threshold. </div><div><br></div><div>Thanks</div>
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