<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On 30 September 2016 at 11:34, Nicola Marzari <span dir="ltr"><<a href="mailto:nicola.marzari@epfl.ch" target="_blank">nicola.marzari@epfl.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 30/09/2016 08:11, Lorenzo Paulatto wrote:<br></span>well, I guess really difficult you mean to make it automatic, correct?<br>
Automatic wannierization/disentanglement without any human intervention<br>
is a bit tricky, but in part is also due to the fact that we never put<br>
a serious effort in it. A few other groups are working on this, including<br>
Steve Louie in Berkeley, Eric Cances in Paris, and Stefano Curtarolo in<br>
Duke.<br clear="all"></blockquote></div><br><br></div><div class="gmail_extra">Hi Nicola,<br></div><div class="gmail_extra">I actually mean really difficult from a theory and computation point of view, even assuming perfect user. It is easy (well, at least it is already done!) to do Wannier interpolation of the Hamiltonian and other observables, but it is hard to do it for wavefunction with the constraint of NOT building explicitly the Wannier functions for the huge supercell that corresponds to the grid... <br><br>Actually, already building explicitly the Wannier function for the initial grid may require a big supercell and probably won't fit in memory.<br><br></div><div class="gmail_extra">And even after you do that, you get a double-sum on k-points that I'm not sure is any faster than doing SCF for the finer grid directly.<br><br></div><div class="gmail_extra">But I may easily be wrong, and there could be non obvious ways to do it more efficiently.<br></div><div class="gmail_extra"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div>Dr. Lorenzo Paulatto </div><div>IdR @ IMPMC -- CNRS & Université Paris 6</div><div>phone: +33 (0)1 44275 084 / skype: paulatz</div><div>www: <a href="http://www-int.impmc.upmc.fr/~paulatto/" target="_blank">http://www-int.impmc.upmc.fr/~paulatto/</a></div><div>mail: 23-24/4é16 Boîte courrier 115, 4 place Jussieu 75252 Paris Cédex 05</div></div>
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