<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Dear Yun, <div class=""><br class=""></div><div class="">you can indeed conduct PIMD using the CP2K built-in PINT module, or using the driver mode </div><div class="">via the i-Pi program. The latter more functionality for more sophisticated PIMD simulations, </div><div class="">though the former already permits to conduct all sort of conventional PIMD simulations and has </div><div class="">the advantage of having everything in one package. </div><div class="">The centroid-pos-1.xyz contains not the coordinates of every bead, but only the ones of the centroid, </div><div class="">i.e. the center of mass of the closed ring-polymer. The centroid-vel-1.xyz contains the corresponding </div><div class="">velocities, but be aware that except the when centroid molecular dynamics is used, the dynamics of </div><div class="">the ring-polymer is unphysical, only static ensemble averages are. </div><div class=""><br class=""></div><div class="">Best, </div><div class="">Thomas</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">Am 30.07.2019 um 18:39 schrieb Yun An <<a href="mailto:anyu...@gmail.com" class="">anyu...@gmail.com</a>>:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><p class="">Dear all,</p><p class=""><br class=""></p><p class="">I want to perform PIMD with cp2k, according to the manual, one can add a PINT session to run path integral simulations; also, can use i-PI mode DRIVER. What is the difference between those two, is that in principle they both can do PIMD? I tried a H2O molecule with run_type of PINT, then I got centroid-pos-1.xyz and centroid-vel.xyz, I thought the centroid-pos-1.xyz is the atom positions of each replica, but what is the meaning of centroid-vel.xyz? Also, I want to see the trajectories, is this directly given in centroid-pos-1.xyz or one need to use some script to transform, because from current centroid-pos-1.xyz , the atoms are not quantum at all.</p><p class=""><br class=""></p><p class="">Thank you all in advance for any help.</p><p class=""><br class=""></p><p class="">Best regards,</p><p class="">Yun</p></div><div class=""><br class="webkit-block-placeholder"></div>
-- <br class="">
You received this message because you are subscribed to the Google Groups "cp2k" group.<br class="">
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp...@googlegroups.com" class="">cp...@googlegroups.com</a>.<br class="">
To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/cp2k/3aa5af5d-4b37-471b-ae2b-18dc83d0b3b5%40googlegroups.com?utm_medium=email&utm_source=footer" class="">https://groups.google.com/d/msgid/cp2k/3aa5af5d-4b37-471b-ae2b-18dc83d0b3b5%40googlegroups.com</a>.<br class="">
<span id="cid:76fa8629-3fd1-46fa-adb9-3e712854c960"><H2O-centroid-pos-1.xyz></span><span id="cid:b91f3390-8b8c-4691-b157-341481e2caf4"><H2O-centroid-vel-1.xyz></span></div></blockquote></div><br class=""></div><br class=""><br class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">==============================</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">Thomas D. Kühne</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">Dynamics of Condensed Matter</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">Chair of Theoretical Chemistry</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">University of Paderborn</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">Warburger Str. 100</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">D-33098 Paderborn</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">Germany</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class=""><a href="mailto:tdku...@mail.upb.de" class="">tdku...@mail.upb.de</a></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: 2;" class="">+49/(0)5251/60-5726</div></div></div>
</div>
<br class=""></body></html>