<div></div><div>Good day.<br /></div><div>I am exploring molecular dynamics under field.</div><div></div><div></div><div>I set glycine at the center of a box,</div><div>and suggested Ehrenfest dynamics with a time step of about 0.04 fs,</div><div>while the custom field file sets the external field to ZERO. <br /></div><div></div><div></div><div>The simulation proceeds alright, till the time-frame 500, after which</div><div>there is a peculiar structural "expansion".</div><div></div><div><b>Q1: Would you comment this?</b></div><div></div><div>Also, I attach a fragment of the momentum file:</div><div>CP2K prints reference point position to be "chaotic",</div><div>while I select
REFERENCE COAC: since the atomic charges of the glycine, <br /></div><div>the reference point should be next to the C-alpha atom. <br /></div><div></div><div>
<b>Q2: would you comment on the usage of the setting I selected? </b><b><br /></b></div><div></div><div>Thank you.</div><div>Victor<br /> </div><div><br /></div>
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