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<p>Dear QE users, <br>
</p>
<p>I would like to ask about how to prepare calculation of very
simple system, consisting of only 2 hydrogen atoms (in fact a
molecule) when I want to force the unfavorable spin state (to
determine differences in total energies between normal state and
antibonding state).<br>
</p>
<p>1. For this reason I think that first I will perform normal relax
procedure (using big vacuum box) followed by SCF for total energy
of 'normal bonding relaxed' state. <br>
</p>
<p>2. Then for relaxed structure I want to force both hydrogen
electrons for 'spin up' configuration (aside of Pauli exclusion
principle), calculate SCF and compare both energies. <br>
</p>
<p>The problem is how to force this unfavorable spin configuration
in QE input file? <br>
</p>
<p><span id="result_box" class="short_text" lang="en"><span class=""><br>
</span></span></p>
<p><span id="result_box" class="short_text" lang="en"><span class="">Thank
you in advance for your answer(s)</span></span></p>
<p><span id="result_box" class="short_text" lang="en"><span class="">Konrad
Gruszka<br>
</span></span></p>
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