Derivation of coupled cluster excited states response functions and multiphoton transition moments between two excited states as derivatives of variational functionals

1998 ◽  
Vol 109 (21) ◽  
pp. 9219-9236 ◽  
Author(s):  
Christof Hättig ◽  
Poul Jo/rgensen
Keyword(s):  
Excited States ◽  
Coupled Cluster ◽  
Response Functions ◽  
Multiphoton Transition ◽  
Transition Moments ◽  
Derivatives Of

scholarly journals Theoretical Electronic and Rovibrational Studies for Anions of Interest to the DIBs

2013 ◽  
Vol 9 (S297) ◽  
pp. 344-348 ◽  
Author(s):  
R. C. Fortenberry
Keyword(s):  
Excited State ◽  
Excited States ◽  
State Of The Art ◽  
Spectroscopic Constants ◽  
Coupled Cluster ◽  
Electronic Excitations ◽  
Electronically Excited States ◽  
Coupled Cluster Theory ◽  
Electronically Excited ◽  
Enolate Anion

AbstractThe dipole-bound excited state of the methylene nitrile anion (CH2CN−) has been suggested as a candidate carrier for a diffuse interstellar band (DIB) at 803.8 nm. Its corresponding radical has been detected in the interstellar medium (ISM), making the existence for the anion possible. This work applies state-of-the-art ab initio methods such as coupled cluster theory to reproduce accurately the electronic excitations for CH2CN− and the similar methylene enolate anion, CH2CHO−. This same approach has been employed to indicate that 19 other anions may possess electronically excited states, five of which are valence in nature. Concurrently, in order to assist in the detection of these anions in the ISM, work has also been directed towards predicting vibrational frequencies and spectroscopic constants for these anions through the use of quartic force fields (QFFs). Theoretical rovibrational work on anions has thus far included studies of CH2CN−, C3H−, and is currently ongoing for similar systems.

scholarly journals Electronically Excited States in Solution via a Smooth Dielectric Model Combined with Equation-of-Motion Coupled Cluster Theory

2017 ◽  
Vol 13 (11) ◽  
pp. 5572-5581 ◽  
Author(s):  
J. Coleman Howard ◽  
James C. Womack ◽  
Jacek Dziedzic ◽  
Chris-Kriton Skylaris ◽  
Benjamin P. Pritchard ◽  
...  
Keyword(s):  
Excited States ◽  
Equation Of Motion ◽  
Coupled Cluster ◽  
Electronically Excited States ◽  
Coupled Cluster Theory ◽  
Cluster Theory ◽  
Dielectric Model ◽  
Electronically Excited

scholarly journals Excited States from State-Specific Orbital-Optimized Pair Coupled Cluster

2021 ◽  
Author(s):  
Fábris Kossoski ◽  
Antoine Marie ◽  
Anthony Scemama ◽  
Michel Caffarel ◽  
Pierre-François Loos
Keyword(s):  
Excited States ◽  
Coupled Cluster
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