<div><br></div>Hi <div><br></div><div>Are you sure that you considered the correct number of degrees of freedom?</div><div>Regards</div><div>Marcella</div><div><br><br></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Thursday, June 9, 2022 at 6:09:06 AM UTC+2 mto 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;">Dear cp2k users,<div><br></div><div>I wanted to conduct a comparison and performed ab initio molecular dynamics (MD) simulations with an imposed initial temperature of 300 K. I then calculated the temperature from the velocities at the 0th step, but this value was 297K, which does not match with the temperature I set. I calculated the latter temperature (297K) from '<a href="http://0step_velocities.xyz" target="_blank" rel="nofollow" data-saferedirecturl="https://www.google.com/url?hl=en&q=http://0step_velocities.xyz&source=gmail&ust=1654877048648000&usg=AOvVaw2XwRZUoHetHjMHHNs-0hWE">0step_velocities.xyz</a>' which is attached on this message. Both of them must be the same because the 0th step velocities are determined by the initial temperature. (The equation I used: 1/2m*v^2 = 3/2kb*T )</div><div>Does anyone know why there is a difference in temperatures? </div><div><br></div><div>Thank you in advance,</div><div>Matsuo</div></blockquote></div>
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