My approach. You chose some valid set of experimental knowns, e.g.
atomization energies of clusters, heats of formation, reactions using
relevant atoms. You then vary the fraction to find the best fit. The value
will only be "best" to about 0.05.
An alternative that in a few cases worked
Dear Wien2k users:
In a recently published work using Hybrid Funtional I read that the authors
have optimized the fraction of exact exchange but I did not understand how
to choose its optimal value
My question is how to optimize the fraction of exact exchange (alpha)
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