<div dir="ltr"><div>I found these two commits that may explain the different behavior:</div><div>---<br></div><div>commit 0a9c825f10b5150231d95f105936f4c1e86f2528</div>Author: Riccardo Bertossa <<a href="mailto:riccardo.bertossa@gmail.com">riccardo.bertossa@gmail.com</a>><br>Date: Tue Jan 21 12:58:32 2020 +0000<br><br><div> ion_velocities = 'random' was not working in cp.x when starting from scratch, but only when doing a restart.</div><div>---</div><div>commit d84c8ba58797be8a128579add9d7d77b447ee76d<br>Author: Riccardo Bertossa <<a href="mailto:rbertoss@sissa.it">rbertoss@sissa.it</a>><br>Date: Mon Oct 22 21:32:33 2018 +0200<br><br> ion_velocities = 'random' in cp.x now works as expected.<br></div><div><br></div><div>Paolo<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jan 3, 2022 at 10:45 AM Mahmoud Payami Shabestari via users <<a href="mailto:users@lists.quantum-espresso.org">users@lists.quantum-espresso.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal">Dear All,</div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal">Hi.</div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal">In a Born-Oppenheimer MD run using cp.x , with CG electron_dyn, Verlet ion_dyn, and random ion_vel, I noticed that in cp-6.4.1, the temperature "tempp" starts from 0.0 in the first step and increases by steps, while in cp-7.0 the tempp value is quite close to the target temperature. I wonder if in 6.4.1 the initial velocities were randomly distributed according to Boltzmann distribution. I did not find any doc on this change in release notes. It seems QE-7.0 starts correctly.</div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal">I would highly appreciate any comments to resolve this issue.</div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal"> </div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal">Best regards,</div>
<div style="font-size:16px;font-family:Tahoma;color:rgb(0,0,0);font-weight:400;font-style:normal">Mahmoud Payami</div>
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