<div dir="ltr"><div><div><div><div><div>Dear Stefano,<br></div>The HF calculation is just a normal self-consistent HF calculation like in "quantum chemical" codes. HF is done "in the same way as a hybrid functional" because HF is a hybrid functional with 100% of exchange and 0% of other exchange-correlation contributions. In general HF will converge more slowly then PBE0 or B3LYP.<br>I would pay attention to the fact that:<br></div>-No HF pseudopotentials are available on the QE library. So you will need to test the effect of the pseudopotentials<br></div>-Since there is a q-->0 limit to be evaluated I would test carefully convergence with respect to k-points (solids) or cell size (molecules). In general convergence is good but not necessarily the same as in the PBE/LDA case<br></div>Best,<br></div>Dario<br><div><div><div><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 11, 2016 at 12:24 AM, stefano <span dir="ltr"><<a href="mailto:stefano.di-sabatino@polytechnique.edu" target="_blank">stefano.di-sabatino@polytechnique.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear all,<br>
<br>
I am interested in the possibility of doing Hartree-Fock calculation<br>
with quantum espresso.<br>
I saw that HF calculations are performed basically in the same way as a<br>
hybrid functional calculation. I wonder if the HF calculation, as<br>
implemented in QE, are equivalent to a "standard" HF calculation (i.e.<br>
using Green's functions or solving self-consistently the Hartree-Fock<br>
eigenvalue equations), and if not what are the difference between the<br>
two methods.<br>
<br>
Thanks in advance<br>
<span class="HOEnZb"><font color="#888888"><br>
Stefano<br>
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