Physics 541

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Physics 541
A quantum approach to condensed matter physics
Class 15
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and hence all properties of the substance
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Proof
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We cant solve interacting systems, so look for a
non-interacting system that gives rise to the
correct density in the interacting one.
Can we find a potential Vs that gives the same
density in a non- interacting system as V does
in an interacting system?
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Procedure
Go back to the beginning.
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-- gives reasonable results
-- gives poor results
Density functional theory is the universallly
accepted method to calculate electronic structure
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