Origin-Independent Dynamic Polarizability Density from Coupled Cluster Response Theory

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  • Francesco F. Summa
  • J. H. Andersen
  • Paolo Lazzeretti
  • Sauer, Stephan P. A.
  • G. Monaco
  • Sonia Coriani
  • Ricardo Zanasi
The calculation of the origin-independent density of the dynamic electric dipole polarizability, previously presented for uncorrelated and density functional theory (DFT)-based methods, has been developed and implemented at the coupled cluster singles and doubles (CCSD) level of theory. A pointwise analysis of polarizability densities calculated for a number of molecules at Hartree–Fock (HF) and CCSD clearly shows that the electron correlation effect is much larger than one would argue considering the integrated dipole electric polarizability alone. Large error compensations occur during the integration process, which hide fairly large deviations mainly located in the internuclear regions. The same is observed when calculated CCSD and B3LYP polarizability densities are compared, with the remarkable feature that positive/negative deviations between CCSD and HF reverse sign, becoming negative/positive when comparing CCSD to B3LYP.
Original languageEnglish
JournalJournal of Chemical Theory and Computation
Volume19
Issue number20
Pages (from-to)7242-7259
Number of pages18
ISSN1549-9618
DOIs
Publication statusPublished - 5 Oct 2023

ID: 369254422