Kjønstad, Eirik F.

1. Multilevel CC2 and CCSD in reduced orbital spaces: electronic\n excitations in large molecular systems
   2020/06/09 by Sarai Dery Folkestad, Folkestad, Sarai D., Eirik F. Kjønstad +5 · 3 citations
   Chemistry · Physics and Astronomy · #Photochemistry and Electron Transfer Studies #Spectroscopy and Quantum Chemical Studies #Advanced Chemical Physics Studies
2. Fermionic tensor network contraction for arbitrary geometries
   2024/10/03 by Gao, Yang, Zhai, Huanchen, Gray, Johnnie +5 · 6 citations
   #FOS: Physical sciences #Quantum Physics (quant-ph) #Strongly Correlated Electrons (cond-mat.str-el)
3. Coupled cluster theory for nonadiabatic dynamics: nuclear gradients and nonadiabatic couplings in similarity constrained coupled cluster theory
   2024/03/01 by Eirik F. Kjønstad, Sara Angelico, Kjønstad, Eirik F. +3 · 4 citations
   Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Nuclear physics research studies #Quantum chaos and dynamical systems
4. Generalized coupled cluster theory for ground and excited state intersections
   2024/11/13 by Federico Rossi, Eirik F. Kjønstad, Rossi, Federico +5 · 4 citations
   Mathematics · #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Random Matrices and Applications
5. Understanding failures in electronic structure methods arising from the geometric phase effect
   2024/11/12 by Eirik F. Kjønstad, Kjønstad, Eirik F., Henrik Koch +1 · 2 citations
   Engineering · Materials Science · #Chemical Physics (physics.chem-ph) #Electron and X-Ray Spectroscopy Techniques #FOS: Physical sciences #Integrated Circuits and Semiconductor Failure Analysis #Semiconductor materials and devices
6. Tensor Network Loop Cluster Expansions for Quantum Many-Body Problems
   2025/10/07 by Gray, Johnnie, Park, Gunhee, Evenbly, Glen +3 · 3 citations
   #FOS: Physical sciences #Quantum Physics (quant-ph)
7. Determining minimum energy conical intersections by enveloping the seam: exploring ground and excited state intersections in coupled cluster theory
   2024/11/12 by Sara Angelico, Angelico, Sara, Eirik F. Kjønstad +3 · 2 citations
   Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Molecular spectroscopy and chirality #Spectroscopy and Quantum Chemical Studies