Dear matteo
I want to compute the value of U,in the paper PRB 71, 035105 (2005),the
Eq.(18),(19),but I don't know how to built the matrices \chi and \chi_0,I want
to built the matrices manually instead of programe pack like your example. And
how do I extract the the date from the out file of unperturbed self-consistent
calculation and the files of perturbed calculations(like pert-0.1.out
,pert-0.2.out and so on ) to construct the matrices of \chi and \chi_0 as in
Eq.(18) ?
Beat regards
Q J Wang
XiangTan University
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