<div>Hi Kai,</div><div><br></div><div>I have a question regarding the TRAVIS and power spectrum.</div><div>What is the required input for the program to calculate the power spectrum?.</div><div>Is it the trajectory only or I have to extract the cube file?<br></div><div>Could you provide me the input file of TRAVIS.</div><div><br></div><div>Thank you for your help.</div><div><br></div><div>Best</div><div>Long</div><br><br><br><br><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Friday, 7 January 2022 at 11:58:45 UTC+8 Kai 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;"><div>
Hello everyone, <br></div><div>I am trying to
<span style="font-weight:normal;font-style:normal;white-space:normal">calculate the vibrational spectrum of an <span style="font-weight:normal;font-style:normal;white-space:normal">inorganic</span>
cluster using TRAVIS. It's simulated for 14 ps with a CSVR timeconstant of 1 ps and 10 fs timestep. I think I get the great shape of theĀ
<span style="font-weight:normal;font-style:normal;white-space:normal">vibrational</span> curve. <b>But it shows a non zero value at 0 cm-1.</b>This should be unreasonable.
<span style="font-style:normal;white-space:normal">What should I do</span>?</span></div><div><span style="font-weight:normal;font-style:normal;white-space:normal"> I guess I should remove the 6 macroscopic degrees of freedom (3x translation, 3x rotation), but how?</span></div><div><span style="font-weight:normal;font-style:normal;white-space:normal"><br></span></div><div><span style="font-weight:normal;font-style:normal;white-space:normal">
Please help me.</span></div><div><span style="font-weight:normal;font-style:normal;white-space:normal">Thanks all.<img alt="power spectrum.png" width="533px" height="408px" src="https://groups.google.com/group/cp2k/attach/c3037b932334b/power%20spectrum.png?part=0.1&view=1"><br>
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