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Dear QE user</div>
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<div>As mentioned in some text books (for eample, A Chemist’s Guide to
Density Functional Theory);<br />
The orbitals satisfying Kohn-Sham equation have no physical
significance and their only connection </div>
<div>to the real world is that the sum of their squares add up to the exact
density.</div>
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<div>by considering this, I cant understand physical relevance of
isosurfaces which plotted in pw postprocess and </div>
<div>the real molecular orbitals (HOMO, LUMO, LUMO+1................).</div>
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<div>thanks in advance</div>
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<div>Yavar Taghipour Azar</div>
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<div>Condensed Matter Section, AEOI</div>
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<div>Tehran, Iran</div>
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