
#1
Feb1408, 07:22 PM

P: 16

1. The problem statement, all variables and given/known data
Hi, I've read from Wikipedia that in the HartreeFock approximation, "Each energy eigenfunction is assumed to be describable by a single Slater determinant". My question is... if the approximation fails and the system has to be described by linear combinations of more than one type of Slater determinants, what type of wave functions would they be determinants of? (besides the oneelectron wave functions) 



#2
Feb1508, 12:57 AM

Sci Advisor
HW Helper
P: 4,739

You cant have Hartee Fock if the potential the particles move is is not the mean field. To answer the question "when does the HartreeFock approximation fail? "




#3
Feb1508, 01:15 AM

P: 16

Thanks for the answer.
actually... i decided to change the question to the one you see now (edited) on the first msg, a few minutes after writing it the first time... i was able to change the body of the msg but not the title of the thread. can this new question be answered here as well? .. or is it a better idea to start a new thread with the right title? 



#4
Feb1508, 01:53 AM

P: 76

when does the HartreeFock approximation fail?
just to ask  when would a mean field approximation fail?
Nonadiabatic processes? 


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