Dear colleagues,

 

The next ETSF online seminar will be given by Stefan Vuckovic from the University of California, Irvine, USA on Friday April 30 at 14:00 CET. 

The title of his talk is "Accurate non-covalent interactions from models for the Møller-Plesset adiabatic connection"

Below you will find an abstract of the seminar.

 

All ETSF members will receive an email with a zoom link a couple of days before the seminar.

If you are not an ETSF member and you would like to follow the seminar please send an email to [email protected]

 

Best wishes,

The ETSF seminar team.

 

 

Abstract: The adiabatic connection (AC) that has as weak-interaction expansion the Møller-Plesset (MP) perturbation series has been recently shown to have a large coupling-strength expansion in terms of functionals of the Hartree-Fock density. Based on these findings, in this talk, I will introduce functionals that approximate directly the MP AC by interpolating between MP2 and the large-coupling strength limit. These functionals have the same cost as double hybrids and capture non-covalent interactions (NCI) very accurately, without using dispersion corrections. They also fix well-known deficiencies of MP2 for noncovalent interactions. This new class of methods is thus competitive with state-of-the-art dispersion enhanced functionals and can even significantly outperform them for a variety of test sets. I will also devote special attention to non-covalent systems where standard DFT enhanced by dispersion correction suffer from large density-driven errors, such as charge-transfer complexes, and discuss how MP AC methods fix this problem.