Dealing with chemical reaction pathways and electronic excitations in molecular systems via renormalized and active-space coupled-cluster methods
Document Type
Conference Proceeding
Publication Date
1-1-2015
Abstract
© 2015 AIP Publishing LLC. Coupled-cluster (CC) theory has become the de facto standard for high-accuracy molecular calculations, but the widely used CC and equation-of-motion (EOM) CC approaches, such as CCSD(T) and EOMCCSD, have difficulties with capturing stronger electron correlations that characterize multi-reference molecular problems. This presentation demonstrates that many of these difficulties can be addressed by exploiting the completely renormalized (CR) CC and EOMCC approaches, such as CR-CC(2,3), CR-EOMCCSD(T), and CR-EOMCC(2,3), and their local correlation counterparts applicable to systems with hundreds of atoms, and the active-space CC/EOMCC approaches, such as CCSDt and EOMCCSDt, and their extensions to valence systems via the electron-attached and ionized formalisms.
Publication Title
AIP Conference Proceedings
Recommended Citation
Piecuch, P.,
Włoch, M.,
Gour, J.,
Li, W.,
&
Lutz, J.
(2015).
Dealing with chemical reaction pathways and electronic excitations in molecular systems via renormalized and active-space coupled-cluster methods.
AIP Conference Proceedings,
1642, 172-175.
http://doi.org/10.1063/1.4906643
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/8987