Hi users, The preconditioner in LR_modules/h_prec.f90 is given in terms of the quantity eprec, which is 1.35 times the expectation value of the kinetic energy. Where does the 1.35 come from?
I saw that this question was asked a number of years ago in the developers' mailing list ( https://lists.quantum-espresso.org/pipermail/developers/2013-May/000505.html), but there was no answer there. Best, Andrew
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