6 papers
Critical point search and linear response theory for computing electronic excitation energies of molecular systems. Part II. CASSCF
Laura Grazioli, Yukuan Hu, Tommaso Nottoli +2
The computation of excited states within the Complete Active Space Self-Consistent Field (CASSCF) framework remains a significant challenge in quantum chemistry, both theoretically…
Experimental proof of strong - mixing in the Renner-Teller and Pseudo-Jahn-Teller affected CCH () ion
Kim Steenbakkers, P. Bryan Changala, Weslley G. D. P. Silva +8
The ethynyl radical cation, CCH (), offers a unique system for fundamental spectroscopic studies of non-adiabatic effects due to its open-shell linear structure and the p…
Solvation Lies Within: Simulating Condensed-Phase Properties from Local Electronic Structures
Kasper F. Schaltz, Jonas Greiner, Filippo Lipparini +1
In transitions between different environmental settings, a molecular system inevitably undergoes a range of detectable changes, and the ability to accurately simulate such response…
A novel implementation of CCSD analytic gradients using Cholesky decomposition of the two-electron integrals and Abelian point-group symmetry
Luca Melega, Tommaso Nottoli, Jürgen Gauss +1
We present a novel and efficient implementation of coupled-cluster with singles and doubles (CCSD) analytic gradients that combines the Cholesky decomposition (CD) of electron-repu…
The QUEST Database of Highly-Accurate Excitation Energies
Pierre-François Loos, Martial Boggio-Pasqua, Aymeric Blondel +2
We report theoretical best estimates of vertical transition energies (VTEs) for a large number of excited states and molecules: the \textsc{quest} database. This database includes…
A polarizable CASSCF/MM approach using the interface between OpenMMPol library and CFour
Tommaso Nottoli, Mattia Bondanza, Filippo Lipparini +1
We present a polarizable embedding quantum mechanics/molecular mechanics (QM/MM) framework for ground- and excited-state Complete Active Space Self-Consistent Field (CASSCF) calcul…