Hi Jingagang,<div><br></div><div>I believe the issue is that although the constraint (shake/rattle) is in principle implemented for RESPA (src/motion/integrator.F) it's only applied to the inner loop of the algorithm which likely uses the high-low force_eval force difference as far as I can see from the code. </div><div><br></div><div>Yours,</div><div><br></div><div>Vladimir<br> </div><div class="gmail_quote"><div dir="auto" class="gmail_attr">вторник, 26 октября 2021 г. в 22:40:46 UTC+2, Jinggang Lan: <br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">When the blue-moon ensemble combines with RESPA, the Lagrangian multipliers are incorrect. The SHAKE Lagrangian Multipliers from RESPA are much smaller than the normal constrained MD.<br></blockquote></div>
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