<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Aptos;
panose-1:2 11 0 4 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Aptos",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="en-CH" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Hi James<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">The stress tensor printed in the CP2K output file does not include any kinetic contributions even during MD runs by contrast to the stress tensor printed to the <project_name>-1.stress
file during an MD run for instance. The latter one is not printed (available) during single point calculations.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Best<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Matthias<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:36.0pt">
<b><span style="color:black">From: </span></b><span style="color:black">cp2k@googlegroups.com <cp2k@googlegroups.com> on behalf of James <james.mcqueen@gmail.com><br>
<b>Date: </b>Friday, 18 July 2025 at 12:31<br>
<b>To: </b>cp2k <cp2k@googlegroups.com><br>
<b>Subject: </b>[CP2K:21668] NPT_F stress tensor calculation<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-left:36.0pt">Hello,<o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt">I am trying to train a machine learning interatomic potential on NPT_F trajectory data generated in CP2K. The training is performed on the trajectory positions, energy, forces, and stress.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt">My question is, what does the stress output from NPT_F in CP2K depend on? Would I be able to take a frame of a trajectory generated from my machine learning interatomic potential, and perform a single point calculation
in CP2K, and make a valid comparison between the values of stress given by the two systems? Or does the stress given by CP2K NPT_F depend on other factors like temperature and velocities which may invalidate this comparison?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt">Thanks<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:36.0pt">James<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-left:36.0pt">-- <br>
You received this message because you are subscribed to the Google Groups "cp2k" group.<br>
To unsubscribe from this group and stop receiving emails from it, send an email to
<a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>.<br>
To view this discussion visit <a href="https://groups.google.com/d/msgid/cp2k/cc84b1f4-c4da-4078-8e0b-3daab24422can%40googlegroups.com?utm_medium=email&utm_source=footer">
https://groups.google.com/d/msgid/cp2k/cc84b1f4-c4da-4078-8e0b-3daab24422can%40googlegroups.com</a>.<o:p></o:p></p>
</div>
</div>
</div>
</div>
</body>
</html>
<p></p>
-- <br />
You received this message because you are subscribed to the Google Groups "cp2k" group.<br />
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>.<br />
To view this discussion visit <a href="https://groups.google.com/d/msgid/cp2k/ZR2P278MB114601B99F5CC187C751659CF450A%40ZR2P278MB1146.CHEP278.PROD.OUTLOOK.COM?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/cp2k/ZR2P278MB114601B99F5CC187C751659CF450A%40ZR2P278MB1146.CHEP278.PROD.OUTLOOK.COM</a>.<br />