Dear cp2k developers and users:<div><br /><div>I recently tried to run metadynamic. Under METADYN /METAVAR /WALL, I set TYPE QUADRATIC and set POSITION between 1~3 angstrom. But in the output results, I found that the actual CV value range exceeded 3 angstrom, and some even reached 4 angstrom.(I know that the unit output by the HILLS file is Bohr, and I have converted it to angstrom.)</div><div><br /></div><div><font size="1"> </font><font size="2"> &METAVAR<br /> SCALE 0.3<br /> COLVAR 1<br /> &WALL<br /> TYPE QUADRATIC<br /> POSITION [angstrom] 3<br /> &QUADRATIC<br /> DIRECTION WALL_PLUS<br /> K [kcalmol] 40.0<br /> &END QUADRATIC<br /> &END WALL<br /> &WALL<br /> TYPE QUADRATIC<br /> POSITION [angstrom] 1<br /> &QUADRATIC<br /> DIRECTION WALL_MINUS<br /> K [kcalmol] 40.0<br /> &END QUADRATIC<br /> &END WALL<br /> &END METAVAR</font><br /></div><div><font size="2"><br /></font></div><div>I have two questions about this:<font size="2"><br /></font></div><div>1. In the manual, there are (REFLECTIVE|QUADRATIC|QUARTIC|GAUSSIAN|NONE) options for WALL/TYPE. I want to know what the difference is between these and how I should choose these types.<font size="2"><br /></font></div><div><font size="1">2. </font>Why does the CV value exceed the WALL? Is it a characteristic of TYPE QUADRATIC itself, or is it caused by an unreasonable structure?</div><div><br /></div><div>Thanks in advance.<br /></div><div>Best Regards</div><div><br /></div><div>Yuqi Wang</div><div><br /><div><br /></div></div></div>
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